diff --git a/org.ntlab.traceAnalyzer/src/org/ntlab/trace/MethodExecutionJPDA.java b/org.ntlab.traceAnalyzer/src/org/ntlab/trace/MethodExecutionJPDA.java
index f95a2ed..c06bb3f 100644
--- a/org.ntlab.traceAnalyzer/src/org/ntlab/trace/MethodExecutionJPDA.java
+++ b/org.ntlab.traceAnalyzer/src/org/ntlab/trace/MethodExecutionJPDA.java
@@ -42,4 +42,27 @@
 	public MethodExecutionJPDA getCallerMethodExecution() {
 		return callerMethodExecution;
 	}
+	
+	/**
+	 * ���̃��\�b�h���s����т��̑S�Ăяo������Ăяo���؂̒��ŋt�����ɒT������(�������Avisitor �� true ��Ԃ��܂�)
+	 * @param visitor �r�W�^�[
+	 * @return�@true -- �T���𒆒f����, false -- �Ō�܂ŒT������
+	 */
+	public boolean traverseMethodExecutionsBackward(IMethodExecutionVisitorJPDA visitor) {
+		if (visitor.preVisitMethodExecution(this)) return true;
+		ArrayList<MethodExecutionJPDA> calledMethodExecutions = getChildren();
+		for (int i = calledMethodExecutions.size() - 1; i >= 0; i--) {
+			MethodExecutionJPDA child = calledMethodExecutions.get(i);
+			if (child.traverseMethodExecutionsBackward(visitor)) return true;
+		}		
+		if (visitor.postVisitMethodExecution(this, null)) return true;
+		return false;
+	}
+	
+	public interface IMethodExecutionVisitorJPDA {
+		abstract public boolean preVisitThread(ThreadInstanceJPDA thread);
+		abstract public boolean postVisitThread(ThreadInstanceJPDA thread);
+		abstract public boolean preVisitMethodExecution(MethodExecutionJPDA methodExecution);
+		abstract public boolean postVisitMethodExecution(MethodExecutionJPDA methodExecution, ArrayList<MethodExecutionJPDA> children);
+	}
 }