A rubber composition for tires, comprising a rubber component having a combined content of polybutadiene rubber, natural rubber, and polyisoprene rubber of 80% by mass or more per 100% by mass of the rubber component, the rubber composition comprising, per 100 parts by mass of the rubber component: 0.1 to 8.0 parts by mass of polyether having a glycol ether content of 80% by mass or more and a HLB of 3.5 to 19.0, the polyether excluding Pluronic nonionic surfactants; 2 to 70 parts by mass of carbon black; and 0.3 to 7.0 parts by mass of an antioxidant, wherein the polyether is represented by R 1 -O-(R 2 -O) n -R 3 or R 4 -{O-(R 2 -O) n -R 1) m, where R 1 represents a hydrogen atom; each R 2 is the same as or different from each other and represents a C2-C10 divalent aliphatic hydrocarbon or divalent alicyclic hydrocarbon group in which a hydrogen atom bound to a carbon atom may be replaced with an aromatic hydrocarbon group; R 3 represents a C1-C20 aliphatic hydrocarbon, alicyclic hydrocarbon, aromatic hydrocarbon, or alkanoyl group in which a hydrogen atom bound to a carbon atom may be replaced with an aromatic hydrocarbon group; R 4 represents a residue that is compound (a) having three or more hydroxyl groups from which the hydroxyl groups are removed; the compound (a) is at least one selected from the group consisting of glycerol, diglycerol, polyglycerol, monosaccharides, polysaccharides, trimethylolpropane, and pentaerythritol; and n and m represent integers which are not limited as long as the HLB and the glycol ether content fall within the respective ranges indicated above, wherein the polyether has a number average molecular weight of 300 to 50,000. the rubber composition comprising, per 100 parts by mass of the rubber component: 0.1 to 8.0 parts by mass of polyether having a glycol ether content of 80% by mass or more and a HLB of 3.5 to 19.0, the polyether excluding Pluronic nonionic surfactants; 2 to 70 parts by mass of carbon black; and 0.3 to 7.0 parts by mass of an antioxidant, 0.1 to 8.0 parts by mass of polyether having a glycol ether content of 80% by mass or more and a HLB of 3.5 to 19.0, the polyether excluding Pluronic nonionic surfactants; 2 to 70 parts by mass of carbon black; and 0.3 to 7.0 parts by mass of an antioxidant, wherein the polyether is represented by R 1 -O-(R 2 -O) n -R 3 or R 4 -{O-(R 2 -O) n -R 1) m, where R 1 represents a hydrogen atom; each R 2 is the same as or different from each other and represents a C2-C10 divalent aliphatic hydrocarbon or divalent alicyclic hydrocarbon group in which a hydrogen atom bound to a carbon atom may be replaced with an aromatic hydrocarbon group; R 3 represents a C1-C20 aliphatic hydrocarbon, alicyclic hydrocarbon, aromatic hydrocarbon, or alkanoyl group in which a hydrogen atom bound to a carbon atom may be replaced with an aromatic hydrocarbon group; R 4 represents a residue that is compound (a) having three or more hydroxyl groups from which the hydroxyl groups are removed; the compound (a) is at least one selected from the group consisting of glycerol, diglycerol, polyglycerol, monosaccharides, polysaccharides, trimethylolpropane, and pentaerythritol; and n and m represent integers which are not limited as long as the HLB and the glycol ether content fall within the respective ranges indicated above, wherein the polyether has a number average molecular weight of 300 to 50,000.