VEHICULAR SEAT

PROBLEM TO BE SOLVED: To provide a vehicular seat in which an adjustment amount of a cushion length of a seat cushion can be stably increased.SOLUTION: A vehicular seat is equipped with a seat cushion 10 comprising a cushion frame 11 and a cushion pad 20 disposed on the cushion frame 11. An air bag 30, which expands and contracts, is provided above a front frame part 14 disposed on the front side of the cushion frame 10. The air bag 30 has vertical plural air-charged chambers 32, 33, 36. When the air bag 30 expands by charging of compression air into the vertical plural air-charged chambers 32, 33, 36, a cushion length can be increased in the state such that lower parts of peripheral walls 32a, 33a of the upper air-charged chambers 32, 33 are supported by an upper part of a peripheral wall 36a of the lower air-charged chamber 36.