a clip having a main clip body that is made of resin and has a shape in front view that is closed at one end and open at the other end . the main clip body has engaging arms and holding members positioned to the inside of the engaging arms . the engaging arms are configured so as to be elastically deformed when the main clip body passes through an installing hole of a partner panel and to engage with a rim of the hole when the engaging arms have been inserted . the holding members are configured so as to keep the main clip body fitted onto the clip seat of the mounted member . the engaging arms and the holding members are connected to assume a substantially diamond - shaped loop in front view , and are configured so that the positions thereof differ in side view , and overlap in front view , when elastically deformed .