To provide a chair storing structure by which support members of a collapsible chair can be made smaller and lighter since they are not subjected to a cantilever load, especially the weight of a user, to provide a washstand, a sink and a burner each of which is provided with a small storing space for a collapsible chair by adopting such a chair storing structure and to provide a collapsible chair which can be suitably stored in any of these chair storing structures.

A collapsible chair 50 having legs L which can stand up for themselves is guided and stored in the inside of a chair storing chamber 10 through a chair shift guide 30 which is formed at least on one inner surface of an open wall 17. A compact storage of the collapsible chair 50 in the chair storing chamber 10 is realized in this way. Furthermore, since the weight of the user does not act on the chair shift guide 30, and the like as a cantilever when the collapsible chair 50 is taken out of the chair storing chamber 10 and is used, these members need not be strongly built with a special strength. Consequently, the chair storing chamber 10 can be efficiently used as a storing space for the collapsible chair 50.