PROBLEM TO BE SOLVED: To provide a deceleration timing notification device for predicting break distance required for decelerating until stopping a vehicle from vehicle speed and a blood pressure fluctuation model, and for notifying the driver of the vehicle of a brake timing without any delay.SOLUTION: A deceleration timing notification device includes: brake distance calculation means for, from the travel speed of a vehicle obtained from GPS information, a target speed at a speed change spot such as the stop spot or slow traffic start spot of a travel vehicle and a preliminarily set blood pressure fluctuation allowable value, calculating brake distance required for decelerating the travel vehicle such that the blood pressure fluctuation allowable value is not exceeded notification distance calculation means for calculating distance by adding distance determined on the basis of the travel speed of the vehicle obtained from the GPS information to the brake distance calculated by the brake distance calculation means and notification means for notifying the driver of the travel vehicle of deceleration start on the basis of the notification distance information from the notification distance calculation means and the distance to the speed change spot such as the stop spot or slow traffic start spot of the travel vehicle from the GPS information and the map information.
