Disclosed is a silicone rubber composition containing 0.2-8 parts by weight of an organic peroxide per 100 parts by weight of a vinyl group-introduced methylfluoroalkyl vinyl silicone rubber mainly containing a dimethylsiloxane copolymerization unit to which 5-50 mol% of methylfluoroalkylsiloxane copolymerization unit is copolymerized. When silica is used as a filler, it is preferably used in combination with a surface active agent for silica and water. The silicone rubber composition is excellent in low temperature characteristics and blister resistance, and is thus suitably used as a sealing material for 70 MPa high pressure hydrogen gasstorage tanks or the like, specifically as a vulcanization molding material for O-rings, packings, gaskets, oil seals, valves and the like. As a high pressure gas to be stored, there can be suitably used not only a hydrogen gas but also an oxygen gas, a nitrogen gas, a helium gas and the like.