A rubber composition for a tire containing 100 parts by weight of a rubber, 1 to 30 parts by weight of a polyether (E1) having the formula (I): R.sup.1-{OCH.sub.2CH.sub.2CH.sub.2CH.sub.2).sub.m(OA).sub.n--OH}.sub.q (I) wherein R.sup.1 is a residue of a C.sub.1 to C.sub.24 compound having 1-6 hydroxyl groups, from which at least one hydroxyl group is removed, A Ls a C.sub.2 to C.sub.24 alkylene group other than a 1,4-butylene group, q is an integer of 1 to 6, and m and n are independently integers of 1 to 600, and/or the derivative thereof (E2) and 10 to 180 parts by weight of a filler, which is excellent in processability, silica dispersability abrasion resistance and wet braking performance, etc.