To provide an exercise support system capable of finding an exercise recommendation time, when an effect by an exercise is efficiently acquired, based on a history of activity information of a person to be measured and notifying it to the person to be measured.

A physical activity meter A finds an exercise intensity of the person to be measured based on detection data of an acceleration sensor by computing, and transmits the computing result of the exercise intensity and time information to a server device B through Internet NT. The server device B receives the activity information and the time information transmitted from the physical activity meter A, allows a storage section to store them, finds a recommendation time to do exercise based on the history of the activity information, and transmits a notification signal including the exercise recommendation time to the physical activity meter A through Internet NT. When receiving the notification signal from the server device B, the physical activity meter A displays the exercise recommendation time contained in the notification signal on a display section 4 or outputs it from a voice output section as buzzer sound and voice message, so that the person can understand the time when the exercise effect is efficiently acquired, based on the notification content.