<p>The receiving part for an auxiliary leg part is formed on a turning part. The turning part turns a predetermined angle by means of the pressing force of the auxiliary leg part acting on the receiving part and created by pressing the leg part of a male part into the insertion part of a female part while the insertion part of the female part is inserted into the attachment hole for an object to be attached. An abutting part to come into contact with a raised part formed on the turning part is formed on the head part of the female part, and the female part moves in a direction that narrows the distance between the turning part and an engagement part by means of the pressing force of the raised part acting on the abutting part and created by means of the turning movement of the turning part.</p>
