To provide a vehicle seat device being little in uncomfortable feeling when a center bending mechanism is brought into operation. The device has a seat cushion frame 1 and a seatback frame 2 having alower-side frame 21 supported at a lower end portion thereof to be tiltable relative to a rear end portion of the seat cushion frame 1, an upper-side frame 22 arranged at an upper portion of the lower-side frame 21 and a center bending mechanism coupling the lower-side frame 21 and the upper-side frame 22 to be bendable forward, wherein the center bending mechanism bends the upper-side frame abouta rotational center T which is ahead of a seatback outer layer H covering a front surface of the seatback frame 2. The movement of the upper-side frame when the same is tilted comes close to the movement of the passenger who bends forward. The slip between the seatback outer layer and the back of the passenger can be minimized, and thus, it becomes possible to lessen an uncomfortable feeling given to the passenger.