diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/MethodExecution.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/MethodExecution.java
index c16140c..1b581d2 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/MethodExecution.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/MethodExecution.java
@@ -268,13 +268,9 @@
 	 * @return �����œn���ꂽmethodExecution���Ăяo�������Ƃ��L�^���Ă��郁�\�b�h�Ăяo��
 	 */
 	public MethodInvocation getMethodInvocation(MethodExecution child) {
-		for (Statement statement : statements) {
-			if (statement instanceof MethodInvocation) {
-				MethodExecution calledMethodExecution = ((MethodInvocation)statement).getCalledMethodExecution();
-				if (calledMethodExecution.equals(child)) {
-					return (MethodInvocation)statement;
-				}
-			}
+		int callerStatementExecution = child.getCallerStatementExecution();
+		if (callerStatementExecution != -1) {
+			return (MethodInvocation)statements.get(callerStatementExecution);			
 		}
 		return null;
 	}