SEAT

Disclosed is a seat including: a seat back; a seat cushion; and a reclining device that couples the seat back to the seat cushion in a swingable manner in one and another directions, wherein the reclining device includes: a locking mechanism that locks and unlocks swinging movement of the seat back; a biasing member that biases the seat back in one direction so as to swing the seat back in the one direction when the locking mechanism is unlocked; and a switching mechanism that switches a biasing direction of the biasing member for the seat back to another direction in a middle of the swinging movement of the seat back.