An alarm apparatus for a vehicle is configure to be capable of communicating with a portable terminal to be used at a driver seat by a driver of the vehicle that performs automatic driving, alarms the driver using the portable terminal, and includes a determination unit that determines whether a distance or arrival time from the vehicle to a termination position for the automatic driving is a predetermined value or less, during the automatic driving, based on position information about the vehicle and map information, or based on surrounding environment information about the vehicle, and an alarm unit that displays alarm information for having the driver start manual driving, on a screen of the portable terminal, when the determination unit determines that the distance or arrival time from the vehicle to the termination position for the automatic driving is the predetermined value or less.