To obtain a solid lubricating film having slight reduction in life even by repeated trial operations in the air.

The solid lubricating film 2 is obtained by alternately laminating at least four layers of a low-density film 2a of molybdenum disulfide having 2.5-3.0 g/cm3 bulk density and a high-density film 2b of molybdenum disulfide having 3.5-4.8 g/cm3 bulk density and 0.05-0.15 μm film thickness to make the surface have a high-density film. The solid lubricating film is obtained by alternately laminating at least four layers of a low-density film 2a of tungsten disulfide having 3.8-4.6 g/cm3 bulk density and a high-density film 2b of tungsten disulfide having 5.3-7.4 g/cm3 bulk density and 0.05-0.15 μm film thickness to make the surface have the high-density film 2b.