A connector, comprising: an insulating housing; and a single conductive terminal received in the insulating housing and comprising: a pair of elastic clamping sheets(123a,123b) adapted to clamp a conductor of a wire inserted into the connector; and a releasing mechanism(124,124a) adapted to separate the pair of elastic clamping sheets (123a,123b) in directions away from each other, to release the clamped conductor, wherein the conductive terminal further comprises a first annular end portion located at an end thereof the conductor of the wire being inserted between the pair of elastic clamping sheets (123a,123b) through the first annular end portion of the conductive terminal, wherein the conductive terminal is further provided with a second annular end portion located at the other end thereof, which is adapted to accommodate the end of the conductor inserted in the connector, the insulating housing comprises a first side wall and a second side wall opposing to each other, characterized in that the first side wall of the insulating housing being provided with a plurality of projections, the second side wall of the insulating housing being provided with a plurality of connecting holes respectively corresponding to the plurality of projections, and the projections of the connector are adapted to be inserted into the connecting holes of another connector, respectively. an insulating housing; and a single conductive terminal received in the insulating housing and comprising: a pair of elastic clamping sheets(123a,123b) adapted to clamp a conductor of a wire inserted into the connector; and a releasing mechanism(124,124a) adapted to separate the pair of elastic clamping sheets (123a,123b) in directions away from each other, to release the clamped conductor, wherein the conductive terminal further comprises a first annular end portion located at an end thereof the conductor of the wire being inserted between the pair of elastic clamping sheets (123a,123b) through the first annular end portion of the conductive terminal, wherein the conductive terminal is further provided with a second annular end portion located at the other end thereof, which is adapted to accommodate the end of the conductor inserted in the connector, the insulating housing comprises a first side wall and a second side wall opposing to each other, characterized in that the first side wall of the insulating housing being provided with a plurality of projections, the second side wall of the insulating housing being provided with a plurality of connecting holes respectively corresponding to the plurality of projections, and the projections of the connector are adapted to be inserted into the connecting holes of another connector, respectively. a pair of elastic clamping sheets(123a,123b) adapted to clamp a conductor of a wire inserted into the connector; and a releasing mechanism(124,124a) adapted to separate the pair of elastic clamping sheets (123a,123b) in directions away from each other, to release the clamped conductor, wherein the conductive terminal further comprises a first annular end portion located at an end thereof the conductor of the wire being inserted between the pair of elastic clamping sheets (123a,123b) through the first annular end portion of the conductive terminal, wherein the conductive terminal is further provided with a second annular end portion located at the other end thereof, which is adapted to accommodate the end of the conductor inserted in the connector, the insulating housing comprises a first side wall and a second side wall opposing to each other, characterized in that the first side wall of the insulating housing being provided with a plurality of projections, the second side wall of the insulating housing being provided with a plurality of connecting holes respectively corresponding to the plurality of projections, and the projections of the connector are adapted to be inserted into the connecting holes of another connector, respectively.