Provided is a flexible printed laminate board manufacturing device which is capable of eliminating waviness satisfactorily and which does not lead to an increase in residual stress in a flexible printed laminate board. A manufacturing device 10 for a flexible printed laminate board 50 is provided with: laminating means 26a, 26b for laminating copper foils 52a, 52b provided with a rust-proof layer 52c while placing the copper foils on a surface of a base material 51; film affixing means 26a, 26b for disposing protection film 53a, 53b on a surface of the rust-proof layer 52c on the opposite side from the copper foil layers 52a, 52b and affixing the rust-proof layer 52c to the protection film 53a, 53b; temperature adjusting means 27 to 29 for performing temperature adjustment so as to retain a generated intermediate product 54 in an appropriate temperature range of 200 degrees to 230 degrees for an appropriate time of 40 seconds to 80 seconds; and peeling means 31a, 32a for peeling the protection films 53a, 53b from the rust-proof layer 52c in the temperature-adjusted intermediate product 54.