To reduce a vertical size of a fuse and ensure reliability of conductive connection.

The input/output terminals 12a having a fusing portion 12 formed by punching a conductive metallic plate is molded inside the insulation resin retaining case 12b. A tab 12c is projected through both side 11a of the retaining case 12b, thereby reducing a vertical size of a fuse 10. In connection with a bus bar 50, the tab 12c of the fuse 10 is insulation displaced and connected to an insulation displacement slot 51a of a female tab 51 on the bus bar 50 side, so as to secure a stable connection state.