A silicone rubber composition comprising(A) 100 parts by weight of polyorganosiloxane having the formula: ##EQU1## wherein R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon group with the proviso that from 0.01 to 0.3% of the R.sup.1 groups are vinyl groups, a is a number of from 1.98 to 2.0001, and n is a number of at least 3,000,(B) 10 to 100 parts by weight of finely divided silica,(C) more than 5 to 20 parts by weight of a polyorganohydrogensiloxane having the formula: ##EQU2## wherein R.sup.2 is a substituted or unsubstituted monovalent hydrocarbon group with the proviso that from 0.2 to 2.5% of the R.sup.2 groups are vinyl groups, b is a number of from 1.5 to 2.0, c is a number of from 0.01 to 0.5, the value of (b+c) is in the range of from 1.8 to 2.1, and m is a number of from 30 to 3,000, and(D) 0.01 to 3 parts by weight of organic peroxide.