Patent ID: 8083285

Claim:
A side under spoiler mounting structure, comprising: a bracket to be mounted to a lower portion of a vehicle, the bracket being made of a metal material having a similar thermal expansion coefficient to that of the lower portion of the vehicle, being formed to be lengthy in a front-rear direction of the vehicle, being bondable to the lower portion of the vehicle, and having an insertion groove that supports the side under spoiler, wherein the side under spoiler is made of a synthetic resin and has an attachment portion engaging with the bracket, the attachment portion being made of a material having a similar thermal expansion coefficient to that of the side under spoiler, wherein an engaging portion of the attachment portion comprises an insertion protruding portion and an engaging click which are inserted into an insertion groove of the bracket, and wherein the engaging click is positioned inside the insertion groove with a distance from an engaging boss provided on an upper end of said insertion groove, such that the engaging click engages with the engaging boss in response to an idle movement of the side under spoiler.