A clip includes a female member, a male member, and a connecting piece. The female member is formed in a cylindrical shape with two open ends, and has an outer flange at an upper cylinder end. A flexible engaging piece is formed in a side section defined by slits formed in the side section, and is provided with an engaging surface facing the outer flange. The male member is formed of a leg shaft and a head provided at an upper end of the leg shaft for a pushing operation. The connecting piece connects the head of the male member with the outer flange of the female member, so that a lower end of the leg shaft of the male member is positioned directly above the upper cylinder end of the female member.