diff --git a/src/web/js/lib/account_validator.js b/src/web/js/lib/account_validator.js
index a8d26cd..0c71d20 100644
--- a/src/web/js/lib/account_validator.js
+++ b/src/web/js/lib/account_validator.js
@@ -3,7 +3,7 @@ function AccountValidator() {
 	this.patternMaestroPW = /^[A-Za-z0-9]{4,16}$/;
 
 	this.patternPlayerID = /^[A-Za-z0-9가-힣-_]{1,8}$/;
-	this.patternPlayerPW = /^[0-9]{4,6}$/;
+	this.patternPlayerPW = /^[0-9]{2,6}$/;
 }
 
 // maestro
@@ -73,11 +73,11 @@ AccountValidator.prototype.isValidPlayerPW = function(textPW) {
 
 AccountValidator.prototype.messageForInvalidPlayerPW = function(textPW) {
 	if(textPW.length < Number(AccountValidator.PLAYER_PW_LENGTH_MINIMUM))
-		return "학생 입장 번호는 " + AccountValidator.PLAYER_PW_LENGTH_MINIMUM + "글자 이상의 숫자로 입력해 주세요.";
+		return "학생 입장 번호는 " + AccountValidator.PLAYER_PW_LENGTH_MINIMUM + "글자 이상의 숫자로만 입력해 주세요.";
 	else if(textPW.length > Number(AccountValidator.PLAYER_PW_LENGTH_MAXIMUM))
-		return "학생 입장 번호는 " + AccountValidator.PLAYER_PW_LENGTH_MAXIMUM + "글자 이하의 숫자로 입력해 주세요.";
+		return "학생 입장 번호는 " + AccountValidator.PLAYER_PW_LENGTH_MAXIMUM + "글자 이하의 숫자로만 입력해 주세요.";
 	else
-		return "학생 입장 번호는 4~6자리 숫자로 입력해 주세요.";
+		return "학생 입장 번호는 2~6자리 숫자로 입력해 주세요.";
 }
 
 
@@ -91,5 +91,5 @@ AccountValidator.MAESTRO_PW_LENGTH_MAXIMUM		= 16;
 AccountValidator.PLAYER_ID_LENGTH_MINIMUM		= 1;
 AccountValidator.PLAYER_ID_LENGTH_MAXIMUM		= 8;
 
-AccountValidator.PLAYER_PW_LENGTH_MINIMUM		= 4;
+AccountValidator.PLAYER_PW_LENGTH_MINIMUM		= 2;
 AccountValidator.PLAYER_PW_LENGTH_MAXIMUM		= 6;
\ No newline at end of file
diff --git a/src/web/js/player_list_navigator.js b/src/web/js/player_list_navigator.js
index b8a71b5..168b434 100644
--- a/src/web/js/player_list_navigator.js
+++ b/src/web/js/player_list_navigator.js
@@ -11,7 +11,6 @@
 PlayerListNavigator.prototype.updateNavigator = function(activePageNo, lastPageNo) {
 	this.activePageNo = activePageNo;
 	this.lastPageNo = lastPageNo;
-	// this.lastPageNo = Math.ceil( (playerCount + 1) / 10 );
 
 	$(this.pagination).empty();
 	this.makePagination();
@@ -41,10 +40,19 @@ PlayerListNavigator.prototype.makePagination = function() {
 	$(this.pagination).append(paginationLeftArrows);
 
 	// numbers
-	for(var pageNo = 1; pageNo < this.lastPageNo + 1; pageNo++) {
-		$(this.pagination).append(
-			'<li class="page-item"><a class="page-link" href="javascript:void(0);" aria-label="' + pageNo + '">' + pageNo + '</a></li>'
-		);
+	var pageGroupNo = this.getPageGroupNo(this.activePageNo);
+	var startNo = pageGroupNo * 10 + 1;
+	var endNo = (pageGroupNo + 1) * 10 > this.lastPageNo ? this.lastPageNo : (pageGroupNo + 1) * 10;
+	for(var pageNo = startNo; pageNo < endNo + 1; pageNo++) {
+		var pageContent = "";
+		if(pageNo == this.activePageNo) {
+			pageContent = '<li class="page-item disabled"><a class="page-link" href="javascript:void(0);" aria-label="'
+				+ pageNo + '">' + pageNo + '</a></li>';
+		} else {
+			pageContent = '<li class="page-item"><a class="page-link" href="javascript:void(0);" aria-label="'
+				+ pageNo + '">' + pageNo + '</a></li>';
+		}
+		$(this.pagination).append(pageContent);
 	}
 
 	// right arrows
@@ -68,6 +76,18 @@ PlayerListNavigator.prototype.makePagination = function() {
 	$(this.pagination).append(paginationRightArrows);
 }
 
+PlayerListNavigator.prototype.getPageGroupNo = function(index) {
+	var pageGroupNo = Math.floor( (index - 1) / 10 );
+	var lastPageGroupNo = Math.floor( (this.lastPageNo - 1) / 10 );
+
+	if(pageGroupNo < 0)
+		return 0;
+	else if(pageGroupNo > lastPageGroupNo)
+		return lastPageGroupNo;
+	else
+		return pageGroupNo;
+}
+
 PlayerListNavigator.prototype.applyClickEvent = function() {
 	var self = this;
 
@@ -81,7 +101,8 @@ PlayerListNavigator.prototype.applyClickEvent = function() {
 
 	for(var pageNo = 1; pageNo < this.lastPageNo + 1; pageNo++) {
 		$("[aria-label='" + pageNo + "']").click(function() {
-			self.onClickPageNo(pageNo);
+			var selectedPageNo = $(this).attr("aria-label");
+			self.onClickPageNo(selectedPageNo);
 		});
 	}
 
@@ -130,20 +151,18 @@ PlayerListNavigator.prototype.disableNavButtons = function() {
 }
 
 PlayerListNavigator.prototype.onClickPageNo = function(pageNo) {
-	console.log(pageNo);
+	// console.log(pageNo);
 	switch(pageNo) {
 		case "first":
 		this.activePageNo = 1;
 		break;
 
 		case "previous":
-		if(this.activePageNo > 1)
-			this.activePageNo -= 1;
+		this.activePageNo = this.getPrevGroupPage();
 		break;
 
 		case "next":
-		if(this.activePageNo < this.lastPageNo)
-			this.activePageNo += 1;
+		this.activePageNo = this.getNextGroupPage();
 		break;
 
 		case "last":
@@ -154,6 +173,34 @@ PlayerListNavigator.prototype.onClickPageNo = function(pageNo) {
 		this.activePageNo = pageNo;
 	}
 
-	console.log(this.activePageNo);
+	// console.log(this.activePageNo);
 	this.playerListManager.onClickPageNo(this.activePageNo);
+}
+
+PlayerListNavigator.prototype.getPrevGroupPage = function() {
+	var savedPageNo = this.activePageNo;
+	var savedPageGroupNo = this.getPageGroupNo(savedPageNo);
+
+	var pageNo = this.activePageNo - 10;
+	var pageGroupNo = this.getPageGroupNo(pageNo);
+
+	if(pageGroupNo < savedPageGroupNo) {
+		var prevGroupLastPageNo = (pageGroupNo + 1) * 10;
+		return prevGroupLastPageNo;
+	}
+	return pageGroupNo * 10 + 1;
+}
+
+PlayerListNavigator.prototype.getNextGroupPage = function() {
+	var savedPageNo = this.activePageNo;
+	var savedPageGroupNo = this.getPageGroupNo(savedPageNo);
+
+	var pageNo = this.activePageNo + 10;
+	var pageGroupNo = this.getPageGroupNo(pageNo);
+
+	if(pageGroupNo > savedPageGroupNo) {
+		var prevGroupLastPageNo = pageGroupNo * 10 + 1;
+		return prevGroupLastPageNo;
+	}
+	return this.lastPageNo;
 }
\ No newline at end of file
diff --git a/src/web/module/maestro_section_add_player.html b/src/web/module/maestro_section_add_player.html
index de8d505..53f7a96 100644
--- a/src/web/module/maestro_section_add_player.html
+++ b/src/web/module/maestro_section_add_player.html
@@ -99,7 +99,7 @@ function onErrorPlayerPW(message) {
 				<label for="entercode" class="col-sm-3 col-form-label">입장 번호</label>
 				<div class="col-sm-9">
 					<input type="text" class="form-control col-sm-9" id="entercode" placeholder="입장 번호 입력">
-					<small class="form-text text-muted">4~6자리의 숫자</small>
+					<small class="form-text text-muted">2~6자리의 숫자</small>
 					<button type="button" class="col-sm-7 btn btn-primary btn-lg mt-3" onClick="addPlayer()">추가</button>
 				</div>
 			</div>
diff --git a/src/web/server/player/login.php b/src/web/server/player/login.php
index 0410f64..00c521e 100644
--- a/src/web/server/player/login.php
+++ b/src/web/server/player/login.php
@@ -8,6 +8,17 @@ $maestroName = $_POST["maestro_name"];
 $name = $_POST["name"];
 $enterCode = $_POST["enter_code"];
 
+if($enterCode === "" || strlen($enterCode) < 2) {
+	set_error_message("입장번호는 2개 이상의 숫자로 입력해야 합니다.");
+	send_result_fail();
+	exit;
+}
+
+if(strlen($enterCode) > 6) {
+	set_error_message("입장번호는 6개 이gk의 숫자로 입력해야 합니다.");
+	send_result_fail();
+	exit;
+}
 
 $maestroInfo = get_maestro_id($maestroName);
 if($maestroInfo === NULL) {
@@ -21,7 +32,7 @@ $maestroAccountType = $maestroInfo["accountType"];
 
 $playerInfo = get_login_data($maestroID, $name, $enterCode);
 if($playerInfo === NULL) {
-	set_error_message("입력한 이름/입장번호와 일치하는 계정이 없습니다");
+	set_error_message("입력한 이름 / 입장번호와 일치하는 계정이 없습니다");
 	send_result_fail();
 	exit;
 }