Mounting structure of resin components

A mounting structure of resin components that is a mounting structure of two resin components, comprising:

• a primary component including an insertion piece extendedly provided from a base portion, and an engagement recessed portion formed in the insertion piece;
• and
• a secondary component capable of being mounted to the primary component, and including an insertion portion configured to guide the insertion piece formed at the base portion, an engagement protruding portion formed in the insertion portion and configured to fit into the engagement recessed portion of the insertion piece, and a restriction wall configured to cover a root side of the insertion piece inserted into the insertion portion in a top plan view of the mounting structure, wherein
• the restriction wall has a tapered shape,
• in the top plan view of the mounting structure, a width of the tapered shape is decreased toward an insertion direction of the insertion piece, the insertion direction is a direction separating from a side of the insertion portion where the primary component is mounted,
• the tapered shape permits the insertion piece to warp toward a direction orthogonal to the insertion direction of the insertion piece and to get over engagement protruding portion, and
• the tapered shape stops the insertion piece inserted into the insertion portion from removing from the insertion portion.