Abstract: A portable networking device has a casing, a power connector, a power adapting unit, a circuit board, and a networking interface disposed on the circuit board. A receiving space is formed on an exterior side surface of the casing, and the power connector is fixed inside the casing. The power adapting unit is fixed inside the casing and electrically connected to the power connector, where the power connector can selectively connected to a detachable power plug or a power cord having a connector. The detachable power plug has a pair of conducting pins, which can be rotatably received inside the receiving space of the casing. The circuit board is disposed in the casing. The instant disclosure includes the detachable power plug having concealable conducting pins, and no external power adapter is needed. All of which allow for easy stowing and transport for the user.