The invention discloses a backrest chair facilitating passengers to take a short rest for a bus. The backrest chair comprises a sponge cushion block, a third mounting plate, a fixed groove, a fixed plate, an air cushion and a magic paste hook surface, the sponge cushion block is mounted on one side of the third mounting plate, the fixed plate is mounted in the middle of the fixed groove, and the magic paste hook surface is mounted on the side surface of the air cushion. The backrest chair is scientific and reasonable in structure, and safe and convenient to use; the sponge cushion block is arranged, so that leaning of the head parts of the passengers during using is facilitated, the head comfort degree when the passengers take a short rest is increased, and meanwhile, influence of vibration of the bus on the passengers taking a rest can also be reduced; a movable plate and a movable groove are formed, position moving of the sponge cushion block is facilitated, the passengers taking a rest can adjust the position of the sponge cushion block according to the self conditions, and thus the passengers can conveniently take a rest better; and a magnet and a rubber plug are arranged, therubber plug is plugged into the fixed groove, and combined with the material of a first mounting plate, so that a second mounting plate and the third mounting plate can be effectively stored to the back of the backrest chair.