Abstract: A retainer (21) for securing an article, e.g. a seat cushion, to a vehicle body consists of plastics-made hollow main body (22) which is inserted into an opening (8) in a vehicle body panel (6). The main body is provided on its outer surface with projections (26, 27a, 27b) which engage with upper and lower surfaces of the panel to prevent withdrawal of the retainer. The main body has an inner space with an open top end (22a) which permits insertion of a frame portion (2, 30) of the seat cushion into the inner space. The main body is further provided on its inner surface with projections (24a, 24b) which prevent withdrawal of the frame portion from the inner space. The inner space is open at the top end only, at least when the frame portion is retained in the inner space, so as to prevent entry of water or dust into the cabin even when the space below the body panel is not closed.