A rubber composition for tires, comprising: a rubber component; an antioxidant; and polyether, the 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 the antioxidant in an amount of 0.3 to 7.0 parts by mass per 100 parts by mass of the rubber component, the polyether having an average mass content of at least two consecutive polyethylene oxide units of 85% or less of a polyethylene oxide mass content of the polyether, 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 or 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; 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; and n and m represent integers which are not limited as long as the content of consecutive polyethylene oxide units falls within the range indicated above. a rubber component; an antioxidant; and polyether, the 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 the antioxidant in an amount of 0.3 to 7.0 parts by mass per 100 parts by mass of the rubber component, the polyether having an average mass content of at least two consecutive polyethylene oxide units of 85% or less of a polyethylene oxide mass content of the polyether, 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 or 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; 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; and n and m represent integers which are not limited as long as the content of consecutive polyethylene oxide units falls within the range indicated above. where R 1 represents a hydrogen atom or 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; 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; and n and m represent integers which are not limited as long as the content of consecutive polyethylene oxide units falls within the range indicated above.