diff --git a/Config/Migration/1769652195_add_index.php b/Config/Migration/1769652195_add_index.php
new file mode 100644
index 0000000..545f61e
--- /dev/null
+++ b/Config/Migration/1769652195_add_index.php
@@ -0,0 +1,65 @@
+<?php
+/**
+ * インデックス追加のみ。
+ *
+ * @package Researchmap\RmNetCommons\Config\Migration
+ */
+class AddIndex1769652195 extends CakeMigration {
+
+/**
+ * Migration description
+ *
+ * @var string
+ */
+	public $description = 'add_index';
+
+/**
+ * Actions to be performed
+ *
+ * @var array $migration
+ */
+	public $migration = array(
+		'up' => array(
+			'create_field' => array(
+				'multidatabase_contents' => array(
+					'indexes' => array(
+						'idx1_p_multidatabase_contents' => array('column' => array('block_id', 'language_id', 'is_active'), 'unique' => 0),
+						'idx2_p_multidatabase_contents' => array('column' => array('`key`(191)'), 'unique' => 0),
+					),
+				),
+				'multidatabase_metadatas' => array(
+					'indexes' => array(
+						'idx1_p_multidatabase_metadatas' => array('column' => array('multidatabase_id', 'is_title'), 'unique' => 0),
+						'idx2_p_multidatabase_metadatas' => array('column' => array('multidatabase_id', 'position', '`rank`'), 'unique' => 0),
+					),
+				),
+			),
+		),
+		'down' => array(
+			'drop_field' => array(
+				'multidatabase_contents' => array('indexes' => array('idx1_p_multidatabase_contents', 'idx2_p_multidatabase_contents')),
+				'multidatabase_metadatas' => array('indexes' => array('idx1_p_multidatabase_metadatas', 'idx2_p_multidatabase_metadatas')),
+			),
+		),
+	);
+
+/**
+ * Before migration callback
+ *
+ * @param string $direction Direction of migration process (up or down)
+ * @return bool Should process continue
+ */
+	public function before($direction) {
+		return true;
+	}
+
+/**
+ * After migration callback
+ *
+ * @param string $direction Direction of migration process (up or down)
+ * @return bool Should process continue
+ */
+	public function after($direction) {
+		return true;
+	}
+}