Disclosed is a lubricant composition which contains an organic molybdenum compound that has a nitrogen (N) atom and/or an oxygen (O) atom and optionally has a sulfur (S) atom in each molecule. The sulfur content in the organic molybdenum compound is 0.5% by mass or less based on the compound. If the lubricant composition is used as a lubricant for a low-friction sliding material, the lubricant composition has an extremely low coefficient of friction. In addition, a sliding mechanism having low friction and excellent wear resistance can be obtained by combining the lubricant composition and a sliding member that has a DLC coating film on the sliding surface.