RUBBER COMPOSITION FOR TIRE

Provided is a rubber composition for tires that is intended mainly for use in an undertread portion of a pneumatic tire, the rubber composition having a low rolling resistance, and excellent steering stability and durability in tires. It is set that the rubber composition includes a rubber component containing 50 mass% or greater of a natural rubber and from 15 mass% to 50 mass% of a terminal-modified butadiene rubber per 100 parts by mass of the rubber component, and a filler containing carbon black and silica that is blended into the rubber component at a mass ratio from 0.1 to 0.5 between a blended amount of the silica and a blended amount of the filler, the rubber composition having a hardness of 73 or greater, and a modulus of repulsion elasticity at 40°C of 60% or greater.