An automotive seat air-conditioning system includes a vehicle seat 1 having a seat portion 1b used by an occupant and a seatback 1a against which the occupant rests his/her back, and a blower 22 for sucking in the air-conditioning air 8 flowing in the compartments. Further, the air-conditioning air 8 is sucked in by the blower 22 from the air inlet 6 formed on the surface of the seatback 1a. At the same time, the air-conditioning air 8 is blown out from a surface portion of the vehicle seat 1 other than the air inlet 6.