MOUNTING STRUCTURE FOR ELECTRIC DEVICE

A mounting structure for an electrical device includes: a vehicle electrical device (10); and a supporting member (20) which supports the electrical device (10). The supporting member (20) includes: a body portion (30) to which the electrical device (10) is supported and fixed; and a front extension portion (40) extending from the body portion (30) toward a vehicle front side further than an end portion (11) of the electrical device (10) at a vehicle front side. The body portion (30) and an end portion (41) of the front extension portion (40) at the vehicle front side are fixed to the vehicle body floor (1), and a rigidity of the front extension portion (40) in a vehicle front-rear direction is lower than a rigidity of the body portion (30) in the vehicle front-rear direction.