A fluorine-based lubricant composition comprising a base oil and a fluorine-containing compound represented by the general formula: CF3(CF)n(CF2O)p(C2F4O)q(C3F6O)rRfCONHAr (wherein, Ar is a 2-benzimidazole group, Rf is a fluorocarbon group of carbon number of from 1 or 2, n is 0, 1 or 2, p, q and r are an integer satisfying the condition p+q+r≦100, where one or two of p, q and r may be 0, and the CF2O group, the CF2O4 group and the C3F6O group are the groups bound randomly in the main chain) as an additive containing in the base oil. The fluorine-based lubricant composition has an improved long term anti-rust property and thermal resistance property, and further the fluorine-based lubricant composition obtained by adding a thickening agent to the composition reduces abrasion of the sliding member such as electric contact having a noble metal surface including a gold or silver plating surface, a copper surface and a copper alloy surface.