To provide a board type temperature fuse of an axial type which has low resistance, is stable, is excellent in fusing workability, and has high pulling strength of a lead conductor.

A pair of membrane electrodes 2, 2 are formed on one surface of an insulating substrate 1. Respective end parts of lead conductors 4 opposing in a straight line are welded to the respective membrane electrodes 2, 2. A low melting fusible alloy piece 3 is welded between tip end surfaces of both of the lead conductors 4, 4. A protective coating 6 is provided so as to cover the low melting fusible alloy piece.