diff --git a/src/game/typing/test/game.js b/src/game/typing/test/game.js
index a6e02cf..8aed54c 100644
--- a/src/game/typing/test/game.js
+++ b/src/game/typing/test/game.js
@@ -113,6 +113,8 @@ var TypingTest = {
 		// inputTextContent.canvasInput._onkeyup = function() {
 		this.inputTextContent.canvasInput._onkeyup = function() {
 			self.checkTypingContents(event);
+			// warning
+			// 	 : checkTypingContents is called onkeyup and onkeydown
 		}
 
 
@@ -245,6 +247,7 @@ var TypingTest = {
 		this.typingIndex = 0;
 
 
+		this.isGameOver = false;
 		this.isTyping = false;
 		this.timeTypingStart = 0;
 		this.timeTypingEnd = 0;
@@ -374,6 +377,9 @@ var TypingTest = {
 	},
 
 	checkTypingContents: function(event) {
+		if(this.isGameOver)
+			return;
+
 		var inputContent = this.inputTextContent.canvasInput.value().trim();
 		var typingContent = this.typingRandomContents[this.typingIndex];
 
@@ -390,6 +396,7 @@ var TypingTest = {
 				console.log("this.typingIndex : " + this.typingIndex);
 				console.log("this.typingContentLength : " + this.typingContentLength);
 				if(this.typingIndex == this.typingContentLength - 1) {
+					this.isGameOver = true;
 					this.gameOver();
 					return;
 				}