A method for manufacturing a press product that includes, in an integrated manner, a flat part and a rod part having a diameter greater than a thickness of the flat part, the method comprising steps of: preparing a preformed material by blanking a blank material, from a strip material having a roughly fixed thickness smaller than the diameter of the rod part but thicker than the thickness of the flat part, to be the preformed material being an original form of the press product, the blank material being blanked in a punching direction by a width greater than the thickness of the strip material in order to have enough volume to obtain a target press product; characterized by forging the rod part in which the rod part is formed into a desired shape while mainly thickening the rod part by interposing the preformed material between a pair of opposed dies and pressing mainly the rod part from a direction roughly orthogonal to the punching direction; and trimming the rod part in which a first unnecessary portion (a) of the preformed material is trimmed, the first unnecessary portion (a) hanging out of a product part as a result of the forging processing, wherein the preformed material remains in contact with a part of the strip material to be passed along in progressive processing in which the steps of preparing the preformed material, forging the rod part, and trimming the rod part are performed, the step of forging the rod part is performed upon turning over the preformed material in a punching orientation by 90° with respect to the strip material and changing orientation of the flat part into a vertical direction, the preformed material having been blanked in the step of preparing the preformed material, and the subsequent step of trimming the rod part is also performed while the flat part is oriented in the vertical direction. preparing a preformed material by blanking a blank material, from a strip material having a roughly fixed thickness smaller than the diameter of the rod part but thicker than the thickness of the flat part, to be the preformed material being an original form of the press product, the blank material being blanked in a punching direction by a width greater than the thickness of the strip material in order to have enough volume to obtain a target press product; characterized by forging the rod part in which the rod part is formed into a desired shape while mainly thickening the rod part by interposing the preformed material between a pair of opposed dies and pressing mainly the rod part from a direction roughly orthogonal to the punching direction; and trimming the rod part in which a first unnecessary portion (a) of the preformed material is trimmed, the first unnecessary portion (a) hanging out of a product part as a result of the forging processing, wherein the preformed material remains in contact with a part of the strip material to be passed along in progressive processing in which the steps of preparing the preformed material, forging the rod part, and trimming the rod part are performed, the step of forging the rod part is performed upon turning over the preformed material in a punching orientation by 90° with respect to the strip material and changing orientation of the flat part into a vertical direction, the preformed material having been blanked in the step of preparing the preformed material, and the subsequent step of trimming the rod part is also performed while the flat part is oriented in the vertical direction.