diff --git a/src/main/java/com/profiler/interceptor/bci/JavaAssistClass.java b/src/main/java/com/profiler/interceptor/bci/JavaAssistClass.java
index 043dbfdcf..e662f7111 100644
--- a/src/main/java/com/profiler/interceptor/bci/JavaAssistClass.java
+++ b/src/main/java/com/profiler/interceptor/bci/JavaAssistClass.java
@@ -7,7 +7,6 @@ import java.util.logging.Logger;
 
 import com.profiler.interceptor.*;
 import javassist.*;
-import javassist.bytecode.Descriptor;
 
 public class JavaAssistClass implements InstrumentClass {
 
@@ -95,7 +94,12 @@ public class JavaAssistClass implements InstrumentClass {
         if (logger.isLoggable(Level.INFO)) {
             logger.info("addStaticBeforeInterceptor catch behavior:" + behavior.getLongName() + " code:" + buildBefore);
         }
-        behavior.insertBefore(buildBefore);
+
+        if(behavior instanceof CtConstructor) {
+            ((CtConstructor) behavior).insertBeforeBody(buildBefore);
+        } else {
+            behavior.insertBefore(buildBefore);
+        }
     }
 
     private void addGetBeforeInterceptor(int id, StringBuilder code) {
@@ -160,8 +164,9 @@ public class JavaAssistClass implements InstrumentClass {
                 String constructorName = constructor.getName();
                 String params = getParamsToString(constructor.getParameterTypes());
 
-//                constructor.insertBefore("{System.out.println(\"*****" + javassistClassName + " Constructor:Param=(" + sb + ") is started.\");}");
-//                constructor.insertAfter("{System.out.println(\"*****" + javassistClassName + " Constructor:Param=(" + sb + ") is finished.\");}");
+//                constructor.insertAfter("{System.out.println(\"*****" + constructorName + " Constructor:Param=(" + params + ") is finished. \" + $args);}");
+//                constructor.addCatch("{System.out.println(\"*****" + constructorName + " Constructor:Param=(" + params + ") is finished.\"); throw $e; }"
+//                        , instrumentor.getClassPool().get("java.lang.Throwable"));
                 addAroundInterceptor(constructorName, id, constructor);
             }
             return true;
diff --git a/src/test/java/com/profiler/interceptor/bci/JavaAssistClassTest.java b/src/test/java/com/profiler/interceptor/bci/JavaAssistClassTest.java
index c9233081b..03af50c42 100644
--- a/src/test/java/com/profiler/interceptor/bci/JavaAssistClassTest.java
+++ b/src/test/java/com/profiler/interceptor/bci/JavaAssistClassTest.java
@@ -90,9 +90,7 @@ public class JavaAssistClassTest {
         InstrumentClass aClass = javaAssistByteCodeInstrumentor.getClass("com.profiler.interceptor.bci.TestLog");
 
         aClass.addDebugLogBeforeAfterMethod();
-        // TODO 생성자에 추가시 에러 분석 필요.
-//        aClass.addDebugLogBeforeAfterConstructor();
-
+        aClass.addDebugLogBeforeAfterConstructor();
 
         Object testObject = aClass.toClass().newInstance();
 
@@ -102,6 +100,9 @@ public class JavaAssistClassTest {
         Method testString = testObject.getClass().getMethod("test", new Class[]{String.class});
         testString.invoke(testObject, "method");
 
+        Constructor<? extends Object> constructor = testObject.getClass().getConstructor(null);
+        Object o = constructor.newInstance();
+
     }
 
 }