A molded part made of a composite material of thermosetting or thermoplastic resin and reinforcing fibers and capable of being fastened to a counterpart (9, 11) with a fastener in a state contacting with the counterpart (9, 11), comprising: a part body; a flange (17, 23) integrally formed at least at one end of the part body through a bend (19, 25), provided with an insertion hole (17h, 23h) into which the fastener is insertable, and being able to be brought into contact with the counterpart (9, 11); a first additional pad (27, 31) additionally and integrally arranged from an outer surface of the flange (17, 23) opposite to a contacting side of the flange (17, 23) to one end of an outer surface of the part body through a small-diameter curved surface that is an outer surface of the bend (19, 25), and provided with a first through hole (27h, 31h) aligning with the insertion hole (17h, 23h) of the flange (17, 23) to allow insertion of the fastener, the small-diameter curved surface being formed between the outer surface of the flange (17, 23) opposite to the contacting side with the counterpart (9, 11) and the outer surface of the part body; and a fastening seat (27f, 31f) formed by machining on an outer surface side of the first additional pad (27, 31), the fastening seat (27f, 31f) being able to support part of the fastener and being flat and perpendicular to the outer surface of the part body; an area end (PAe) of a processed area formed by machining on the first additional pad (27, 31) and positioned on the part body beyond the bend (19, 25); and a slope (27s, 31s) formed at an end, on the part body side, of the first additional pad (27, 31) and gradually thinning from the area end (PAe) toward a front end thereof; characterized by: the molded part further comprising: a second additional pad (29, 33) additionally and integrally formed on an outer surface of the contacting side of the flange (17, 23) and provided with a second through hole (29h, 33h) aligning with the insertion hole (17h, 23h) of the flange (17, 23) to allow insertion of the fastener; and a flat contacting surface (29f, 33f) formed by machining on an outer surface side of the second additional pad (29, 33), the contacting surface (29f, 33f) being able to be brought into contact with the counterpart (9, 11) and being perpendicular to the outer surface of the part body. a part body; a flange (17, 23) integrally formed at least at one end of the part body through a bend (19, 25), provided with an insertion hole (17h, 23h) into which the fastener is insertable, and being able to be brought into contact with the counterpart (9, 11); a first additional pad (27, 31) additionally and integrally arranged from an outer surface of the flange (17, 23) opposite to a contacting side of the flange (17, 23) to one end of an outer surface of the part body through a small-diameter curved surface that is an outer surface of the bend (19, 25), and provided with a first through hole (27h, 31h) aligning with the insertion hole (17h, 23h) of the flange (17, 23) to allow insertion of the fastener, the small-diameter curved surface being formed between the outer surface of the flange (17, 23) opposite to the contacting side with the counterpart (9, 11) and the outer surface of the part body; and a fastening seat (27f, 31f) formed by machining on an outer surface side of the first additional pad (27, 31), the fastening seat (27f, 31f) being able to support part of the fastener and being flat and perpendicular to the outer surface of the part body; an area end (PAe) of a processed area formed by machining on the first additional pad (27, 31) and positioned on the part body beyond the bend (19, 25); and a slope (27s, 31s) formed at an end, on the part body side, of the first additional pad (27, 31) and gradually thinning from the area end (PAe) toward a front end thereof; characterized by: the molded part further comprising: a second additional pad (29, 33) additionally and integrally formed on an outer surface of the contacting side of the flange (17, 23) and provided with a second through hole (29h, 33h) aligning with the insertion hole (17h, 23h) of the flange (17, 23) to allow insertion of the fastener; and a flat contacting surface (29f, 33f) formed by machining on an outer surface side of the second additional pad (29, 33), the contacting surface (29f, 33f) being able to be brought into contact with the counterpart (9, 11) and being perpendicular to the outer surface of the part body. the molded part further comprising: a second additional pad (29, 33) additionally and integrally formed on an outer surface of the contacting side of the flange (17, 23) and provided with a second through hole (29h, 33h) aligning with the insertion hole (17h, 23h) of the flange (17, 23) to allow insertion of the fastener; and a flat contacting surface (29f, 33f) formed by machining on an outer surface side of the second additional pad (29, 33), the contacting surface (29f, 33f) being able to be brought into contact with the counterpart (9, 11) and being perpendicular to the outer surface of the part body. a second additional pad (29, 33) additionally and integrally formed on an outer surface of the contacting side of the flange (17, 23) and provided with a second through hole (29h, 33h) aligning with the insertion hole (17h, 23h) of the flange (17, 23) to allow insertion of the fastener; and a flat contacting surface (29f, 33f) formed by machining on an outer surface side of the second additional pad (29, 33), the contacting surface (29f, 33f) being able to be brought into contact with the counterpart (9, 11) and being perpendicular to the outer surface of the part body.