A support includes a base, an upper cover connected to the base, a support plate, and a base. The upper cover includes a recess for receiving a bottom of an electronic device, and two openings defined in a bottom of the recess at two opposite ends of the recess for movably receiving pressing members. A pair of pressing members are respectively moveably received in the two openings. Each of the pair of pressing members includes a protruding post rotatably connected to the base. Two elastic members arrange in the base to respectively apply a recoiling, spring force to the pressing members when compressing and releasing. When urged by an electronic device, the pressing members deflect downward to form a first receiving space; and when the electronic device is removed, the pressing members are recoiled by the elastic members and forms a second receiving space.