The present invention provides a circular connector, which comprises a male head and a female seat. The male head provides a first circular body, a third circular body, a first electrode group and a third electrode group. The female seat provides a first base, a second circular body, a fourth circular body, a second base, a second electrode group and a fourth electrode group. The second base, the fourth circular body, the second circular body and the first base are arranged outwards from the center point of the female seat. The male head is combined with the female base, so that the third circular body is inserted between the second circular body and the fourth circular body to realize non-directional electrical connection.