diff --git a/dictation_server/db/migrations/066-insert_initial_job_number.sql b/dictation_server/db/migrations/066-insert_initial_job_number.sql
new file mode 100644
index 0000000..985026e
--- /dev/null
+++ b/dictation_server/db/migrations/066-insert_initial_job_number.sql
@@ -0,0 +1,19 @@
+-- +migrate Up
+INSERT INTO job_number (account_id, job_number)
+SELECT 
+    a.id AS account_id,
+    COALESCE(t.max_job_number, '00000000') AS job_number
+FROM 
+    accounts a
+LEFT JOIN (
+    SELECT 
+        account_id, 
+        MAX(job_number) AS max_job_number
+    FROM 
+        tasks
+    GROUP BY 
+        account_id
+) t ON a.id = t.account_id;
+
+-- +migrate Down
+TRUNCATE TABLE job_number;
\ No newline at end of file
diff --git a/dictation_server/src/constants/index.ts b/dictation_server/src/constants/index.ts
index c91dd23..f295ed5 100644
--- a/dictation_server/src/constants/index.ts
+++ b/dictation_server/src/constants/index.ts
@@ -346,7 +346,6 @@ export const STORAGE_WARNING_THRESHOLD_PERCENT = 80;
  */
 export const INITIAL_JOB_NUMBER = '00000000';
 
-
 /**
  * JobNumberの最大値
  * @const {string}