A portable electronic device includes a main body, a keyboard, and a connecting assembly connected between the main body and the keyboard. An electromagnetic module is mounted in the main body. The connecting assembly includes a latch member configured to latch the main body and a magnet module corresponding to the electromagnetic module. The magnet module is fixed to the latch member. When the electromagnetic module is powered off, the latch member is located at a first position and locks the main body to the connecting assembly. When the electromagnetic module is powered on, the electromagnetic module pushes the magnet module and the latch member to a second position, where the latch member is unlocked from the main body and the main body is detachable from the connecting assembly.