To provide an attachment structure of an article to a panel which permits a high engagement strength by elastic engagement claws and a sufficient fixation even if an object of attachment is thin and located in no sufficient depth.

The attachment structure of the article to the panel which holds the article on the panel by fitting parts of an article into openings provided in a panel and engaging resilient engagement claws 7 provided on the sides of the article with the edge portions of the openings in the panel is provided with the resilient engagement claws 7, as if to extend diagonally outward with respect to the sides of the article in parallel with the panel from the sides of the article, which include slopes 7a inclining in the two directions including the extension direction where the slopes extend from the side of the article and a fitting direction where the slopes fit into the opening of the panel and wedge-shaped engagement steps 7b formed almost continuously with the slopes 7a are provided. The engagement step portions 7b are engaged with the edge portions of the openings of the panel.