A vehicle seat that can effectively restrain a passenger from moving outward in a vehicle width direction in the event of a collision of a vehicle is obtained.
A vehicle seat (10) is equipped with a pop-up bar (18) that is supported displaceably upward with regard to the vehicle with respect to a seat back (14), an MGG (22) that is operated to displace the pop-up bar (18) upward with regard to the vehicle with respect to the seat back (14), a tension cloth (26) that is connected on an upper end side thereof to the pop-up bar (18) and on a lower end side thereof to a front end side of a seat cushion (12), and a lateral collision ECU (30) that operates the MGG (22) in a case where a lateral collision of the vehicle is detected or predicted. The tension cloth (26) is deployed such that a tensile force is applied between a connection portion thereof to the pop-up bar (18) and a connection portion thereof to the seat cushion (12) as the pop-up bar (18) is displaced to a popped-up position.