A timer reminder device includes an acquiring portion, a determination portion, and a notification portion. When the determination portion determines that a predetermined display condition for displaying a timer setting information is satisfied, the notification portion permits a display portion to display the timer setting information acquired by the acquiring portion. As the display condition, the determination portion determines whether a user is getting off the vehicle. The notification portion permits the display portion to display the timer setting information for a fixed period when the determination portion determines that the user is getting off the vehicle.