A seat apparatus for vehicle

a seat apparatus (10) for a vehicle comprising a supporting member (78) (174) (274) and a moving member (44) (173) (273) whose position is adjustable relative to the supporting member by a link mechanism (7) while a posture of the moving member is in a predetermined posture. The link mechanism includes a link member (45) (145) (245) rotatably connected to the supporting member and the moving member respectively, a first gear (73) (173a) (273a) secured to the moving member, a second gear (74) (174a) (274a) secured to the supporting member and a transmitting gear (72) (172) (272) rotatably supported to the link member. The transmitting member includes a first partial gear (72a) (172a) (272a) meshing with the first gear and a second partial gear (72b) (172b) (272b) meshing with the second gear.