PRESS-MOULDED ARTICLE MANUFACTURING METHOD AND VEHICLE LOWER ARM

A press-formed product (10) includes a main body part (11) having a first end part (11a) and a second end part (11b) respectively on both ends, and a protruded part (12) that protrudes outward of bending from a bent part of the main body part (11). On a surface of the top plate part (13a) of the main body part (11), a groove part (15) is provided in a domain on the first end part (11a) side from a root of the protruded part (12). A first vertical wall part (14a) extending from the first end part (11a) of the main body part (11) to the protruded part (12) has a corner part (16) connecting the main body part (11) and the protruded part (12). An angle that is formed by a part which is on the main body part (11) side from the corner part (16) and a part which is on the protruded part (12) side from the corner part (16) is an acute angle. A method for producing the press-formed product (10) includes a first step of forming the first vertical wall part (14a) without forming a shape of the groove part (15) in a surface shape of the top plate part (13a), and a second step of forming the shape of the groove part (15) in the surface shape of the top plate part (13a).