An information recording device for recording information in information recording media (1; 101) manufactured by using a stamper, the information recording device comprising: a second sub information generating section that generates second sub information by data-converting stamper unique information common for each stamper, based on medium unique information that differs for each of the information recording media (1; 101) having recorded therein in advance main information and first sub information that is obtained by data-converting reproduction permitting information necessary for reproducing the main information based on the stamper unique information; and a second sub information recording section that records, in each of the information recording media (1; 101), the second sub information generated by the second sub information generating section in a form different from forms of the main information and the first sub information, wherein each of the information recording media (1; 101) includes concave-convex recording marks formed by means of the stamper in accordance with the main information and the first sub information, and a reflection film formed on the concave-convex recording marks, the first sub information is recorded by at least one of a displacement of the concave-convex recording marks, deformation of the concave-convex recording marks, and modification of a predetermined pattern of data to be recorded by the concave-convex recording marks, and the second sub information recording section records the second sub information on each of the information recording media (1; 101) by applying laser light with an interval longer than a longest mark of the concave-convex recording marks and changing a reflectance of the reflection film. a second sub information generating section that generates second sub information by data-converting stamper unique information common for each stamper, based on medium unique information that differs for each of the information recording media (1; 101) having recorded therein in advance main information and first sub information that is obtained by data-converting reproduction permitting information necessary for reproducing the main information based on the stamper unique information; and a second sub information recording section that records, in each of the information recording media (1; 101), the second sub information generated by the second sub information generating section in a form different from forms of the main information and the first sub information, wherein each of the information recording media (1; 101) includes concave-convex recording marks formed by means of the stamper in accordance with the main information and the first sub information, and a reflection film formed on the concave-convex recording marks, the first sub information is recorded by at least one of a displacement of the concave-convex recording marks, deformation of the concave-convex recording marks, and modification of a predetermined pattern of data to be recorded by the concave-convex recording marks, and the second sub information recording section records the second sub information on each of the information recording media (1; 101) by applying laser light with an interval longer than a longest mark of the concave-convex recording marks and changing a reflectance of the reflection film.