Disclosed is a vehicle seat device configured so that the seat cushion can be suitably held at a raised position and that side links are compact. A vehicle seat device is provided with a movement mechanism (41) capable of moving the seat cushion (24) between a seating position and a stowed position. The movement mechanism is provided with: a cross member (52) provided to the seat cushion; left and right, front support brackets (53, 54) provided to the vehicle body floor (12); left and right, side links (55, 56) rotatably connected to the left and right, front support brackets and rotatably connected to the cross member; and a guide link (57) which has first guide support shafts (71a, b) rotatably provided in front of the rotation support shafts (67, 75) of the side links and which also has a second guide support shaft (71e) rotatably provided to the cross member.