The invention relates to a manufacturing method of an image recording medium wherein during the process of cutting a long roll body of the medium into sheet like product the curl tendency, a cause of poor printer feedability, is removed, and at the same time the generation of cracking in a recording layer is suppressed. In the manufacturing method a web of a long roll body, a sheet like material of a paper substrate with thermoplastic resin layers formed on both surfaces one of which also has a recording layer with the long roll body wound such that this recording layer surface is on the outside, is unwound into a cutting device whilst at the same time a straightening element of a roller of diameter between 8 mm and 16 mm is pressed against the side of the recording layer with a wrap angle that is less than 60 degrees.