A tip-up vehicle seat comprises a seat back (11) attached to a vehicle body, a seat bottom (14) displaceable between a retracted position and a available position, a leg member (17) displaceable between a retracted position and a support position, a lock mechanism (18) arranged to hold the seat bottom at the retracted position. The lock mechanism (18) is connected to the leg member (17) through a wire cable (43) so that the lock mechanism (18) is unlocked by rotational movement of the leg member (17) from the retracted position toward the support position to release the restriction to the seat bottom (14).
