An electronic device includes a device body and a female terminal structure connected to the device body. The female terminal structure includes a female terminal body, a tunnel, a second terminal member, and a secured terminal member. The female terminal body is connected to the device body and a mating electronic device, respectively. The tunnel is recessed from the female terminal body. The second terminal member is disposed at the female terminal body and received in the tunnel. The second terminal member has a terminal inserting portion capable of receiving a first terminal member of the mating electronic device. The secured terminal member is disposed at the female terminal body, spaced from the second terminal member, and disposed on an outer periphery of the extension portion. The secured terminal member is capable of being in contact with a free terminal member of the mating electronic device.