A portable electronic device includes a first body having a first surface and a second surface opposite to each other, a second body movably disposed on the first body covers the first surface, a first frame fixed on the first body, a second frame pivoted to the first frame, and a third frame fixed on the second body and slidably coupled to the second frame. The second frame is capable of sliding between a first position and a second position relative to the third frame. When the second frame is located on the second position relative to the third frame, the first frame is capable of rotating towards the first position from the second position to reach a third position relative to the second frame, such that the second body is capable of being turned over from the first surface to the second surface relative to the first body.