diff --git a/install/install_config.php b/install/install_config.php
index f02ceeae2..9df437041 100644
--- a/install/install_config.php
+++ b/install/install_config.php
@@ -49,13 +49,6 @@ if ($_POST['agree'] != '동의함') {
             <input name="mysql_db" type="text" id="mysql_db">
         </td>
     </tr>
-    <tr>
-        <th scope="row"><label for="">Port</label></th>
-        <td>
-            <span>가능한 변경하지 마십시오.</span>
-            <input name="mysql_port" type="text" value="3306" id="mysql_port">
-        </td>
-    </tr>
     <tr>
         <th scope="row"><label for="">TABLE명 접두사</label></th>
         <td>
diff --git a/install/install_db.php b/install/install_db.php
index 10570b2f6..ae491ed03 100644
--- a/install/install_db.php
+++ b/install/install_db.php
@@ -17,7 +17,6 @@ $mysql_host  = $_POST['mysql_host'];
 $mysql_user  = $_POST['mysql_user'];
 $mysql_pass  = $_POST['mysql_pass'];
 $mysql_db    = $_POST['mysql_db'];
-$mysql_port  = $_POST['mysql_port'];
 $table_prefix= $_POST['table_prefix'];
 $admin_id    = $_POST['admin_id'];
 $admin_pass  = $_POST['admin_pass'];
@@ -25,7 +24,7 @@ $admin_name  = $_POST['admin_name'];
 $admin_email = $_POST['admin_email'];
 
 @mysql_query('set names utf8');
-$dblink = @mysql_connect($mysql_host.':'.$mysql_port, $mysql_user, $mysql_pass);
+$dblink = @mysql_connect($mysql_host, $mysql_user, $mysql_pass);
 if (!$dblink) {
     echo '<meta http-equiv="content-type" content="text/html; charset=utf-8">'.PHP_EOL;
     echo '<div>MySQL Host, User, Password 를 확인해 주십시오.</div>'.PHP_EOL;
@@ -175,7 +174,7 @@ $f = @fopen($file, 'w');
 
 fwrite($f, "<?php\n");
 fwrite($f, "if (!defined('_GNUBOARD_')) exit;\n");
-fwrite($f, "define('G4_MYSQL_HOST', '{$mysql_host}:{$mysql_port}');\n");
+fwrite($f, "define('G4_MYSQL_HOST', '{$mysql_host}');\n");
 fwrite($f, "define('G4_MYSQL_USER', '{$mysql_user}');\n");
 fwrite($f, "define('G4_MYSQL_PASSWORD', '{$mysql_pass}');\n");
 fwrite($f, "define('G4_MYSQL_DB', '{$mysql_db}');\n\n");