To provide a manufacturing method of a stamper capable of simplifying a manufacturing process by mainly eliminating a development process, and a manufacturing method of an optical information recording medium using the stamper.

The manufacturing method of a stamper includes a photoresist formation process for forming a photoresist layer 22 where a shape of a heat mode can be changed on a substrate 21; a laser light radiation process for forming a hole 23 by irradiating the photoresist layer 22 with laser light; and a plating process for performing electric plating by forming a conductive layer on the photoresist layer 22 where the hole 23 is formed.