To provide a method for manufacturing a die for forming an optical element excellent in a die releasing property to glass, without deficiency concerning films such as exfoliation, cracking, and deterioration of base material of the die, and excellent in durability and economical efficiency.

The method for manufacturing the die for forming the optical element is characterized in that the method comprises; a process for forming a kind of film of a material selected from among metals, nitrides, and carbides at least one a forming surface 1a of base material 1 of the die for forming the optical element by a film forming device; a process for forming a chromium oxide film on the kind of film formed on the forming surface 1a by the film forming device; a process to be performed simultaneously with previous process, for implanting at least a kind of ion selected from among inert gas, nitrogen, and oxygen on the forming surface 1a.