diff --git a/src/main/java/com/eactive/eai/adapter/handler/TemplateAdapterErrorMsgHandler.java b/src/main/java/com/eactive/eai/adapter/handler/TemplateAdapterErrorMsgHandler.java
index 2d1956f..714f99b 100644
--- a/src/main/java/com/eactive/eai/adapter/handler/TemplateAdapterErrorMsgHandler.java
+++ b/src/main/java/com/eactive/eai/adapter/handler/TemplateAdapterErrorMsgHandler.java
@@ -9,7 +9,7 @@ import java.util.regex.Pattern;
 
 import org.apache.commons.lang3.StringUtils;
 
-import com.eactive.eai.adapter.AdapterPropManager;
+import com.eactive.eai.common.property.PropManager;
 import com.eactive.eai.common.util.Logger;
 import com.eactive.eai.message.StandardItem;
 import com.eactive.eai.message.StandardMessage;
@@ -62,6 +62,12 @@ import com.eactive.eai.message.StandardMessage;
  *       {{/foreach}}
  *     </errors>
  *   </error>
+ *
+ * [callProp 중첩 Properties 참조]
+ * callProp 의 값이 Properties 인 경우 점(.) 으로 체인 탐색이 가능하다.
+ *   callProp.put("OUTBOUND", subProps)  // subProps.setProperty("IF_ID", "SVC001")
+ *   → 템플릿에서 ${callprop.OUTBOUND.IF_ID} 로 참조
+ * 중간 값이 Properties 가 아닌 경우 전체 keyPath 를 키로 폴백 조회한다.
  */
 public class TemplateAdapterErrorMsgHandler implements AdapterErrorMessageHandler {
 
@@ -91,7 +97,7 @@ public class TemplateAdapterErrorMsgHandler implements AdapterErrorMessageHandle
             StandardMessage resStandardMessage) throws Exception {
 
         String templateKey = inboundAdapterGroupName + ".template";
-        String template = AdapterPropManager.getInstance().getProperty(PROP_GROUP, templateKey);
+        String template = PropManager.getInstance().getProperty(PROP_GROUP, templateKey);
 
         if (StringUtils.isBlank(template)) {
             if (logger.isWarn()) {
@@ -135,20 +141,48 @@ public class TemplateAdapterErrorMsgHandler implements AdapterErrorMessageHandle
 
     /**
      * 변수 표현식을 해석해 값을 반환한다.
-     * - "callprop.키" → callProp.getProperty("키")
-     * - 그 외          → StandardMessage.findItemValue(expr)
+     * - "callprop.키"        → callProp 에서 직접 조회
+     * - "callprop.부모.자식" → callProp.get("부모") 가 Properties 이면 중첩 탐색
+     * - 그 외               → StandardMessage.findItemValue(expr)
      */
     private String resolveScalar(String expr, StandardMessage msg, Properties callProp) {
         if (expr.startsWith(CALLPROP_PREFIX)) {
-            String key = expr.substring(CALLPROP_PREFIX.length());
-            if (callProp != null) {
-                return StringUtils.defaultString(callProp.getProperty(key));
-            }
-            return "";
+            if (callProp == null) return "";
+            String keyPath = expr.substring(CALLPROP_PREFIX.length());
+            return StringUtils.defaultString(resolveCallProp(callProp, keyPath));
         }
         return StringUtils.defaultString(msg.findItemValue(expr));
     }
 
+    /**
+     * Properties 체인을 점(.) 구분자로 재귀 탐색한다.
+     * - 첫 세그먼트의 값이 Properties 이면 나머지 경로로 재귀
+     * - String 이면 반환, 그 외 Object 이면 toString() 반환
+     * - 첫 세그먼트 값이 Properties 가 아닌 경우 전체 keyPath 로 폴백 조회
+     */
+    private String resolveCallProp(Properties props, String keyPath) {
+        int dotIdx = keyPath.indexOf('.');
+        if (dotIdx < 0) {
+            Object val = props.get(keyPath);
+            if (val == null)              return null;
+            if (val instanceof String)    return (String) val;
+            return val.toString();
+        }
+
+        String first = keyPath.substring(0, dotIdx);
+        String rest  = keyPath.substring(dotIdx + 1);
+        Object val = props.get(first);
+        if (val instanceof Properties) {
+            return resolveCallProp((Properties) val, rest);
+        }
+
+        // 중간 값이 Properties 가 아닌 경우: 전체 keyPath 를 키로 폴백
+        Object direct = props.get(keyPath);
+        if (direct == null)              return null;
+        if (direct instanceof String)    return (String) direct;
+        return direct.toString();
+    }
+
     /**
      * GRID 타입 배열 아이템을 반복하며 blockContent 를 각 행으로 치환,
      * 결과를 쉼표로 이어 반환한다. (foreach 블록 내부는 callProp 참조 미지원)
diff --git a/src/test/java/com/eactive/eai/adapter/handler/TemplateAdapterErrorMsgHandlerTest.java b/src/test/java/com/eactive/eai/adapter/handler/TemplateAdapterErrorMsgHandlerTest.java
index 7326022..fc9a769 100644
--- a/src/test/java/com/eactive/eai/adapter/handler/TemplateAdapterErrorMsgHandlerTest.java
+++ b/src/test/java/com/eactive/eai/adapter/handler/TemplateAdapterErrorMsgHandlerTest.java
@@ -15,7 +15,7 @@ import org.junit.jupiter.api.Test;
 import org.mockito.Mockito;
 import org.springframework.context.ApplicationContext;
 
-import com.eactive.eai.adapter.AdapterPropManager;
+import com.eactive.eai.common.property.PropManager;
 import com.eactive.eai.common.util.ApplicationContextProvider;
 import com.eactive.eai.message.StandardItem;
 import com.eactive.eai.message.StandardMessage;
@@ -26,7 +26,7 @@ import com.eactive.eai.message.StandardType;
  *
  * - render() : package-private 이므로 같은 패키지에서 직접 호출
  * - generateNonStandardErrorResponseMessage() : ApplicationContextProvider 에
- *   mock ApplicationContext 를 리플렉션으로 주입하여 AdapterPropManager 격리
+ *   mock ApplicationContext 를 리플렉션으로 주입하여 PropManager 격리
  */
 class TemplateAdapterErrorMsgHandlerTest {
 
@@ -210,6 +210,69 @@ class TemplateAdapterErrorMsgHandlerTest {
 
             assertEquals("", handler.render("${callprop.ADAPTER_NAME}", msg, null));
         }
+
+        @Test
+        @DisplayName("callProp 값이 Properties 인 경우 중첩 탐색")
+        void callProp_중첩_Properties() {
+            Properties sub = new Properties();
+            sub.setProperty("IF_ID", "SVC001");
+            sub.setProperty("SVC_NM", "조회서비스");
+
+            Properties callProp = new Properties();
+            callProp.put("OUTBOUND", sub);
+            callProp.setProperty("ADAPTER_NAME", "MY_ADAPTER");
+
+            StandardMessage msg = buildMsg("E001", "오류", "", null);
+            String template = "{\"adapter\":\"${callprop.ADAPTER_NAME}\",\"ifId\":\"${callprop.OUTBOUND.IF_ID}\",\"svcNm\":\"${callprop.OUTBOUND.SVC_NM}\"}";
+
+            String result = handler.render(template, msg, callProp);
+
+            assertEquals("{\"adapter\":\"MY_ADAPTER\",\"ifId\":\"SVC001\",\"svcNm\":\"조회서비스\"}", result);
+        }
+
+        @Test
+        @DisplayName("중첩 Properties 3단계 탐색")
+        void callProp_3단계_중첩() {
+            Properties level2 = new Properties();
+            level2.setProperty("CODE", "L2CODE");
+
+            Properties level1 = new Properties();
+            level1.put("LEVEL2", level2);
+
+            Properties callProp = new Properties();
+            callProp.put("LEVEL1", level1);
+
+            StandardMessage msg = buildMsg("E001", "오류", "", null);
+
+            assertEquals("L2CODE", handler.render("${callprop.LEVEL1.LEVEL2.CODE}", msg, callProp));
+        }
+
+        @Test
+        @DisplayName("중간 값이 Properties 가 아니면 전체 keyPath 로 폴백 조회")
+        void callProp_중간값_비Properties_폴백() {
+            Properties callProp = new Properties();
+            callProp.setProperty("A.B", "FALLBACK_VALUE"); // 점 포함 키
+            callProp.setProperty("A", "NOT_PROPS");        // String 값
+
+            StandardMessage msg = buildMsg("E001", "오류", "", null);
+
+            // A 는 String 이므로 Properties 가 아님 → "A.B" 전체 키로 폴백
+            assertEquals("FALLBACK_VALUE", handler.render("${callprop.A.B}", msg, callProp));
+        }
+
+        @Test
+        @DisplayName("중첩 Properties 에서 없는 키는 빈 문자열")
+        void callProp_중첩_없는키() {
+            Properties sub = new Properties();
+            sub.setProperty("EXIST", "VALUE");
+
+            Properties callProp = new Properties();
+            callProp.put("SUB", sub);
+
+            StandardMessage msg = buildMsg("E001", "오류", "", null);
+
+            assertEquals("", handler.render("${callprop.SUB.NONE_KEY}", msg, callProp));
+        }
     }
 
     // ================================================================
@@ -341,16 +404,16 @@ class TemplateAdapterErrorMsgHandlerTest {
     }
 
     // ================================================================
-    // generateNonStandardErrorResponseMessage – AdapterPropManager mock
+    // generateNonStandardErrorResponseMessage – PropManager mock
     // ================================================================
 
     @Nested
     @DisplayName("generateNonStandardErrorResponseMessage")
     class GenerateMethod {
 
-        private void injectMockPropManager(AdapterPropManager mockPropManager) throws Exception {
+        private void injectMockPropManager(PropManager mockPropManager) throws Exception {
             ApplicationContext mockCtx = Mockito.mock(ApplicationContext.class);
-            Mockito.when(mockCtx.getBean(AdapterPropManager.class)).thenReturn(mockPropManager);
+            Mockito.when(mockCtx.getBean(PropManager.class)).thenReturn(mockPropManager);
             Field ctxField = ApplicationContextProvider.class.getDeclaredField("context");
             ctxField.setAccessible(true);
             ctxField.set(null, mockCtx);
@@ -359,7 +422,7 @@ class TemplateAdapterErrorMsgHandlerTest {
         @Test
         @DisplayName("템플릿 미설정 시 null 반환")
         void 템플릿_없으면_null() throws Exception {
-            AdapterPropManager mockProp = Mockito.mock(AdapterPropManager.class);
+            PropManager mockProp = Mockito.mock(PropManager.class);
             Mockito.when(mockProp.getProperty(anyString(), anyString())).thenReturn(null);
             injectMockPropManager(mockProp);
 
@@ -373,7 +436,7 @@ class TemplateAdapterErrorMsgHandlerTest {
         @Test
         @DisplayName("빈 템플릿 시 null 반환")
         void 빈_템플릿_null() throws Exception {
-            AdapterPropManager mockProp = Mockito.mock(AdapterPropManager.class);
+            PropManager mockProp = Mockito.mock(PropManager.class);
             Mockito.when(mockProp.getProperty(anyString(), anyString())).thenReturn("   ");
             injectMockPropManager(mockProp);
 
@@ -388,7 +451,7 @@ class TemplateAdapterErrorMsgHandlerTest {
         @DisplayName("템플릿 설정 시 StandardMessage 치환 결과 반환")
         void 템플릿_stdmsg_치환() throws Exception {
             String template = "{\"code\":\"${MSG.MAIN_MSG.outp_msg_cd}\"}";
-            AdapterPropManager mockProp = Mockito.mock(AdapterPropManager.class);
+            PropManager mockProp = Mockito.mock(PropManager.class);
             Mockito.when(mockProp.getProperty(
                     eq(TemplateAdapterErrorMsgHandler.PROP_GROUP),
                     eq("MY_GROUP.template"))).thenReturn(template);
@@ -405,7 +468,7 @@ class TemplateAdapterErrorMsgHandlerTest {
         @DisplayName("callProp 값이 템플릿에 치환되어 반환")
         void 템플릿_callProp_치환() throws Exception {
             String template = "{\"adapter\":\"${callprop.ADAPTER_NAME}\",\"code\":\"${MSG.MAIN_MSG.outp_msg_cd}\"}";
-            AdapterPropManager mockProp = Mockito.mock(AdapterPropManager.class);
+            PropManager mockProp = Mockito.mock(PropManager.class);
             Mockito.when(mockProp.getProperty(
                     eq(TemplateAdapterErrorMsgHandler.PROP_GROUP),
                     eq("MY_GROUP.template"))).thenReturn(template);
@@ -423,7 +486,7 @@ class TemplateAdapterErrorMsgHandlerTest {
         @Test
         @DisplayName("템플릿 키는 {adapterGroupId}.template 형식으로 조회")
         void 템플릿_키_형식_검증() throws Exception {
-            AdapterPropManager mockProp = Mockito.mock(AdapterPropManager.class);
+            PropManager mockProp = Mockito.mock(PropManager.class);
             Mockito.when(mockProp.getProperty(anyString(), anyString())).thenReturn(null);
             injectMockPropManager(mockProp);