diff --git a/dictation_server/db/migrations/031-create_worktypes.sql b/dictation_server/db/migrations/031-create_worktypes.sql
new file mode 100644
index 0000000..e7bda77
--- /dev/null
+++ b/dictation_server/db/migrations/031-create_worktypes.sql
@@ -0,0 +1,16 @@
+-- +migrate Up
+CREATE TABLE IF NOT EXISTS `worktypes` (
+	`id` BIGINT UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY COMMENT 'worktypeの内部ID',
+	`account_id` BIGINT UNSIGNED NOT NULL COMMENT 'アカウントID',
+	`custom_worktype_id` VARCHAR(255) NOT NULL COMMENT 'ユーザーが決めるWorktypeID',
+	`description` VARCHAR(255) COMMENT 'Worktypeの説明',
+	`deleted_at` TIMESTAMP COMMENT '削除時刻',
+	`created_by` VARCHAR(255) COMMENT '作成者',
+	`created_at` TIMESTAMP DEFAULT now() COMMENT '作成時刻',
+	`updated_by` VARCHAR(255) COMMENT '更新者',
+	`updated_at` TIMESTAMP DEFAULT now() on UPDATE now() COMMENT '更新時刻',
+	UNIQUE custom_worktype_id_index (custom_worktype_id, account_id)
+) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci;
+
+-- +migrate Down
+DROP TABLE `worktypes`;
\ No newline at end of file