A method of press forming that forms a press-formed product (1, 21) into a target shape, the press-formed product having: a top portion (3, 23); a side wall portion (5, 25) continuing from the top portion; and a flange portion (7, 27) continuing from the side wall portion via a ridge (11, 31), the flange portion being configured to curve at least in a convex or concave manner in a height direction, the method comprising: a first forming process that forms: the top portion having the same shape as a top portion of the target shape of the press-formed product; and the side wall portion and the flange portion, such that a side wall height of the side wall portion of the press-formed product becomes larger than a side wall height of the target shape, the side wall height of the side wall portion being a distance between the top portion and the flange portion in the height direction of the press-formed product; and a second forming process that reforms the ridge between the side wall portion and the flange portion such that the side wall height of the side wall portion formed in the first forming process becomes the side wall height of the target shape, wherein the side wall height of the side wall portion formed in the first forming process is being set to be larger than the side wall height of the target shape by adding a value half or less of a radius of curvature of the ridge, in a longitudinal direction vertical cross section, of the target shape. a top portion (3, 23); a side wall portion (5, 25) continuing from the top portion; and a flange portion (7, 27) continuing from the side wall portion via a ridge (11, 31), the flange portion being configured to curve at least in a convex or concave manner in a height direction, the method comprising: a first forming process that forms: the top portion having the same shape as a top portion of the target shape of the press-formed product; and the side wall portion and the flange portion, such that a side wall height of the side wall portion of the press-formed product becomes larger than a side wall height of the target shape, the side wall height of the side wall portion being a distance between the top portion and the flange portion in the height direction of the press-formed product; and a second forming process that reforms the ridge between the side wall portion and the flange portion such that the side wall height of the side wall portion formed in the first forming process becomes the side wall height of the target shape, wherein the side wall height of the side wall portion formed in the first forming process is being set to be larger than the side wall height of the target shape by adding a value half or less of a radius of curvature of the ridge, in a longitudinal direction vertical cross section, of the target shape. a first forming process that forms: the top portion having the same shape as a top portion of the target shape of the press-formed product; and the side wall portion and the flange portion, such that a side wall height of the side wall portion of the press-formed product becomes larger than a side wall height of the target shape, the side wall height of the side wall portion being a distance between the top portion and the flange portion in the height direction of the press-formed product; and the top portion having the same shape as a top portion of the target shape of the press-formed product; and the side wall portion and the flange portion, such that a side wall height of the side wall portion of the press-formed product becomes larger than a side wall height of the target shape, the side wall height of the side wall portion being a distance between the top portion and the flange portion in the height direction of the press-formed product; and a second forming process that reforms the ridge between the side wall portion and the flange portion such that the side wall height of the side wall portion formed in the first forming process becomes the side wall height of the target shape, wherein the side wall height of the side wall portion formed in the first forming process is being set to be larger than the side wall height of the target shape by adding a value half or less of a radius of curvature of the ridge, in a longitudinal direction vertical cross section, of the target shape.