An interior part for a vehicle including a first rib(s) extending on the side that faces a vehicle body at a time of mounting the interior part to the vehicle body, and a second rib(s) extending to cross the first rib, in which an inserting portion(s) that is inserted into an opening(s) provided in the vehicle body is formed at portion(s) where the first rib and the second rib cross each other and projects toward the vehicle body, and this inserting portion(s) is provided with a third rib(s) that extends toward the vehicle body from the first rib and a fourth rib(s) that extends toward the vehicle body from the second rib.