A fixing device for an article attaching member that makes it possible to fix with sufficient strength an article attaching member, to which a desired article or articles is/are capable of being attached, to a fragile wall surface made of gypsum board or the like by easy work, is provided. In a state where a first engaging portion 14 and a second engaging portion 15 are contacted with a wall surface 50a, nails 20 inserted respectively through guide holes 14a and 15a of the first and second engaging portions 14 and 15 are pushed into the wall surface 50a, thereby engaging the first and second engaging portions 14 and 15 with the wall surface 50a. An engaged portion 41 of an article attaching member 40 is inserted into a space S formed by an engagement wall 11 and the first and second side walls 12 and 13, and the engaged portion 41 of the member 40 received in the space S is engaged with the engagement wall 11, thereby fixing the member 40 to the wall surface 50a at a desired location. It is preferred that the engaged portion 41 and the engagement wall 11 are connected together using a connecting means (for example, a screw member, a nail or pin, a glue, an adhesive, a magnet, etc.).