Manufacturing method and manufacturing apparatus of optical member

To provide a method for manufacturing an optical member with less powdery substances such as grinding dust attached thereto, and a manufacturing device.SOLUTION: A method for manufacturing an optical member includes the steps of: preparing a laminated body 100 having an optical film 50 and an adhesive layer 80 disposed on one surface of the optical film 50, the laminate body having an end surface E with powdery substances f attached; and removing the powdery substances f from the end surface E by hitting dry ice particles d to the end surface E of the laminated body 100. The laminated body 100 has a hole H penetrating through in a thickness direction of the optical film 50 as well as the adhesive layer 80, and the end surface E serves as an inner surface of the hole H.SELECTED DRAWING: Figure 3