A portable electronic device including at least one body, an antenna module, and a rotation mechanism is provided. The antenna module includes an antenna unit, a driving member, and a linking rod. The antenna unit is rotatably disposed on the body, the driving member is slidably disposed on the body and abuts the antenna unit, and a portion of the antenna unit blocks on a sliding path of the driving member, to drive the antenna unit to rotate to open and close relative to the body when the driving member slides. The linking rod has opposite first and second ends. The first end is pivotally connected to the driving member. The rotation mechanism is disposed on the body, the second end is pivotally connected to the rotation mechanism and eccentric to a rotating axis of the rotation mechanism, to slide the driving member when the rotation mechanism rotates.