Provided is a fuse device capable of maintaining the insulation performance while using a fuse element having a considerable size to improve rating. The fuse device includes a fuse element 2 and a case 3 for housing the fuse element 2, and the case 3 has a resin portion 4 having a surface to be melted by heat accompanying blowout of the fuse element 2 on at least a part of an inner wall surface 8a facing the inside 8 housing the fuse element 2.

The present invention relates to a pattern fuse including a flame retardant coating layer and an opening, the pattern fuse being configured to prevent fire outbreak due to overcurrent generated when a circuit pattern is operated and to designate a breakage position, a flexible printed circuit board including the same, and a battery module including the same, wherein it is possible to prevent fire outbreak even when the pattern fuse is heated to a high temperature as the result of operation of the pattern fuse, and the pattern fuse is broken by fusing at a specific position thereof.