The lubricating oil composition, the sliding mechanism using the lubricating oil compositions

Provided is a lubricating oil composition that exhibits a very low coefficient of friction when used as a lubricating oil for a low friction sliding material, and a specific low friction sliding material is obtained using the lubricating oil composition. To provide a sliding mechanism excellent in low friction by combining with a sliding member having a film on a sliding surface. SOLUTION: Lubricant base oil, based on the total amount of the composition, (A) organic dithiophosphate is 0.005 to 0.12% by mass in terms of phosphorus concentration, (B) amine friction reducer is 0.05. And 5% by mass, and (C) an alkaline earth metal salicylate detergent and / or an alkaline earth metal sulfonate detergent containing 0.05 to 0.5% by mass in terms of alkaline earth metal concentration A lubricating oil composition used for a moving material, wherein the component (A) contains 0.005 to 0.05 mass% of primary dialkyldithiophosphate zinc in terms of phosphorus concentration. A lubricating mechanism used for a moving material, and a sliding mechanism in which the lubricating oil composition is interposed between sliding surfaces of two sliding members that slide relative to each other. At least one sliding surface has 5 to 50 atm of hydrogen. A sliding mechanism that DLC coating is formed containing m%. [Selection figure] None