A doll includes a body which is formed by two body cases and two flexible members are clamped by the two body cases. A flexible neck is connected to the top of the body and a head is connected to the flexible neck. Two arms are respectively connected to two arm ends of the two flexible members and each arm is composed of two arm cases. Two hands are pivotably connected to the two arms. The doll can be assembled quickly and firmly without using any nail. The arms, legs and head can be moved naturally to increase the value of the doll.