A backrest for a vehicle seat has a rear wall and an integrated device for supplying hot air to the shoulder, neck and head region of a seated person. The device has at least one air duct leading to an air discharge opening, a fan housing, which accommodates a fan and is connected on the delivery side to the air duct and has an air intake opening connected to an air inlet opening in the rear wall, and a heating element, which is arranged in the air flow of the fan. In order for the hot air supply device to take up less empty space in the backrest and for it to be able to be fitted simply and rapidly, the air duct and the fan housing are combined to form a single-piece module arranged on the inner surface of the rear wall.