To reduce effectively troublesome to an alarm of a driver, and to suppress effectively habituation to the alarm of the driver.

When a vehicle approaches a temporary stop spot and an alarm is required to be issued to a driver, an alarm level when issuing an alarm next time is set from a temporary stop execution frequency based on passing state information when passing the temporary stop spot in the past (step S30). When generating an alarm corresponding to the set alarm level, an alarm content or an alarm sound level is changed corresponding to the present vehicle speed, a time zone, a noise level in a vehicle cabin or the like (step S40).