Silicone-based lubricant composition and sintered oil-containing bearing impregnated therewith

[Problem] The purpose of the present invention is to provide a silicone-based lubricant composition wherein excellent rust prevention can be exhibited by stably dispersing a rust inhibitor in a silicone oil that has excellent thermostability, oxidation stability, and a high index of viscosity, and a sintered oil-containing bearing impregnated therewith. [Solution] This silicone-based lubricant composition comprises 90.0 to 99.4 mass% of silicone oil with a kinematic viscosity of 20 to 1000 mm 2 /s at 25°C, 0.1 to 5.0 mass% of a mixture of one or more types of silica gel with a primary particle average size of 30 nm or less, and 0.5 to 5.0 mass% of a mixture of one or more types of rust inhibitor.