Joining structure of resin parts

摘要

A joining structure is provided which includes a first resin member (1) and a second resin member (2) having respective joining portions that are joined together by friction welding. The joining structure further includes a projecting wall (5) that is opposed to the joining portions of the first and second resin members with a spacing therebetween. In the joining structure, at least one notch (15) is formed in a surface of the projecting wall (12) that faces the joining portions of the first and second resin members.