An electrical plug includes a base having an accommodating portion, a first hinge member rotatably disposed in the accommodating portion and having a recess, a first prong having one end connected to the first hinge member, a second prong having one end connected to the first hinge member. And the recess is disposed between the first prong and the second prong, a second hinge member is rotatably disposed in the accommodating portion, and a third prong has one end connected to the second hinge member. The first prong and the second prong are rotated by the first hinge member to be selectively received in the accommodating portion, and when the first prong and the second prong are received in the accommodating portion, the third prong is selectively rotated to be received in the recess.