To provide a high-voltage fuse for easily producing and improving functions by making the fuse immediately melt when overcurrent flows.

The high-voltage fuse is made from a shape-different material 6 wherein a thin-walled section is arranged at the center of a direction orthogonal to the longitudinal direction and a thick-walled section 8 is arranged on both sides of the thin-walled section 7, the shape-different material 6 is cut in a width shorter than the width of the shape-different material 6, the thin-walled section 7 of the shape-different material is set up to be a fuse melting section 3 by forming holes and/or a narrow-width section on the thin-walled section 7, the thick-walled section 8 is set up to be a terminal section 4, the fuse melting section 3 is covered with a case 21, and the terminal section 4 sticks out from both end faces of the case 21.