Manufacturing method of press-formed product

A manufacturing method of a press-formed product that includes a first wall part, a second wall part intersecting with the first wall part, and a bent part connecting the first wall part and the second wall part to each other, the manufacturing method comprising:

• forming, in a workpiece, a through part that runs through the workpiece;
• bending the workpiece in which the through part is formed to form an intermediate product in which the first wall part, the second wall part, and the bent part are formed;
• and
• removing an excess part from the intermediate product to obtain the press-formed product, the excess part being continuous with each of the first wall part, the second wall part, and the bent part in the intermediate product,
• the through part being formed in the workpiece so as to be in a position, in the intermediate product, where a boundary line between the second wall part and the excess part intersects with the bent part, and
• the intermediate product being cut along a boundary line between the first wall part and the excess part from a direction intersecting with the first wall part and cut along the boundary line between the second wall part and the excess part from a direction intersecting with the second wall part, to thereby remove the excess part from the intermediate product.