Method for manufacturing molded article

A method for manufacturing a molded product having a recessed/protruding part from a molded substrate (A) including reinforcing fibers and a matrix resin by press molding,

• the method comprising:
• a step (I) of placing the molded substrate (A) in one of molds including an upper mold and a lower mold and deforming the molded substrate (A) in an in-plane direction by heating the molded substrate and pressing the molded substrate in the mold;
• and
• a step (II) of deforming the molded substrate (A) deformed in the in-plane direction in an out-of-plane direction by depressurizing the mold subsequent to the step (I),
• a step (III) of calculating a deformation ratio T using the following formula, wherein the deformation ratio T is within the range 0.1 to 1:
• T=X/Z (1)
• an in-plane deformation rate X={(a surface area of a recessed part of the mold having the recessed part)/(a projected area of an opening of the recessed part of the mold having the recessed part, the opening being projected in the out-of-plane direction of the molded substrate (A), which is a raw material)}1/2,
• an out-of-plane deformation rate Z=(a maximum thickness of the molded product)/(a thickness P of the molded substrate (A)),
• the thickness P=(a mass of the molded substrate (A))/(an apparent density)/(an area of the molded substrate (A)).