Mounting structure for mounting component

A mounting structure for a mounting component, comprising:

• a cylindrical portion with a radially enlarged portion radially enlarged at one end of the cylindrical portion of the mounting component;
• and
• a first member including a holding portion for holding the mounting component and to which a second member is mounted by the mounting component,
• the holding portion being provided with:
• a housing space for the mounting component, the housing space being formed with a base portion, a side wall portion upstanding from the base portion, and a seat portion being continuous with a top of the side wall portion and having a bolt through hole into which a bolt is inserted;
• and
• a mounting component insertion hole provided in the side wall portion for inserting the mounting component into the housing space,
• wherein the bolt through hole abuts on a peripheral surface of the cylindrical portion of the mounting component, and
• the holding portion is provided with:
• a communication portion for providing communication between the bolt through hole and the mounting component insertion hole, for allowing passage of the cylindrical portion of the mounting component into the bolt through hole;
• and
• restrictions for forming a narrow portion in the communication portion, the narrow portion being narrower than an outer dimension of the cylindrical portion of the mounting components;
• wherein the seat portion is provided with lightening portions close to the restrictions and receiving portions, for receiving the radially enlarged portion of the mounting component, are formed at locations overlapping the lightening portions when viewed from an axial direction of the bolt through hole.