A portable electronic device includes a first frame, a second frame, a flexible display fixed to the first frame and fixed to the second frame, a hinge connected between the first frame and the second frame, the hinge being configured to control an angle between the first frame and the second frame; and an angle limiter for limiting the angle between the first frame and the second frame. The angle limiter includes a first stopper bracket coupled to the first frame, and a second stopper bracket coupled to the second frame. The first stopper bracket is spaced apart from the second stopper bracket in a closed state of the portable electronic device, and comes into contact with the second stopper bracket in an open state of the portable electronic device.