To provide a grease composition for an electrical contact excellent in sulfide-resistance of the contact and in improving effect of stability of contact resistance and further improved in heat stability, storage stability or the like.

The grease composition for an electrical contact contains against 100 pts.wt. of (A) a polyorganosiloxane having a viscosity at 25°C of 10-100,000 mPa s, 0.1-30 pts.wt. of (B) a thickener, 0.01-3 pts.wt. of (C) an organomercaptan, and 0.01-3 pts.wt. of (D) sulfurized oil and fat that are processed with a fine-powdered active carbon. As the component (A), a polyorganosiloxane represented by general formula: [R1aSiO(4-a)/2]n may be used.