Vehicle seat

A vehicle seat comprising:

• a support bracket that is provided at a floor of a vehicle;
• a rotation bracket that is rotatably coupled to the support bracket;
• a lock member that is provided at the floor;
• a lower rail, a front end portion of the lower rail being fixed to the rotation bracket and a rear end portion of the lower rail being locked by the lock member;
• an upper rail that is attached to the lower rail so as to be capable of sliding in a vehicle front-rear direction;
• a seat body that is fixed to the upper rail;
• a rotation force application member that applies rotation force to the rotation bracket such that the lower rail rotates in a direction in which the seat body springs up;
• a speed reduction member that reduces a rotation speed of the rotation bracket in a case in which the seat body springs up;
• and
• a rotation force reduction member that reduces the rotation force applied by the rotation force application member by engaging with the rotation force application member within a predetermined rotation angle range in a case in which the rotation bracket rotates in a direction opposite to the direction in which the seat body springs up.