The invention relates to an electronic control device (20, 20a-201) including an interrupt wire. The electronic control device includes a substrate (21), component-mounted wires (26, 26a) disposed on the substrate, electronic components (22, 22a, 24) mounted on the respective component-mounted wires, a common wire (23) disposed on the substrate (21) and coupled with each of the electronic components, and an interrupt wire (30, 30a-30e) coupled between one (26) of the component-mounted wires and the common wire (23). The interrupt wire melts in accordance with heat generated by an overcurrent. The interrupt wire includes a first wire section (31, 31a, 31b, 35) and a second wire section (32) shorter than the first wire section. The first wire section and the second wire section is coupled with each other at a predetermined angle that is determined so that one of the wire sections is coupled with the common wire (23) and the other is coupled with the one of the component-mounted wires.