<p>Of the disclosed grommet, a shaft body is provided with: a first contact section that contacts the contacted sections of leg sections by means of being pressed in; and a second contact section that is positioned more to the back of the pressing in compared to the first contact section. The shaft body is such that after a portion of the legs is spread by means of the first contact section, another portion of the legs is spread by means of pushing the shaft body in further. The grommet is provided with a temporary fastening means that temporarily fastens the shaft body and a main body at a position before the aforementioned pressing in wherein a portion of the shaft body is received within the main body.</p>
