To propose a seat enabling a seated person to rise with ease.

This seat is provided with a backrest 2 for supporting the seated person's back, and a seat cushion 3 for supporting the seated person's hips. The backrest 2 has a backrest body 4 and a backrest movable part 5. The backrest movable part 5 can be operated between a first position to perform the original function of the backrest, and a second position to press and support the back of the seated person P so that the upper part of the body of the seated person P rises. The seat cushion 3 has a cushion body 6 and a cushion movable part 7. The cushion movable part 7 can be operated between a first position to perform the original function of the seat cushion, and a second position to press and support the hips in the rising direction of the hips of the seated person P.