The present invention provides a rubber composition for a tire which has high elongation at break while having high hardness and low tanδ, and in particular, is suitable for bead apexes and base treads. The rubber composition for a tire comprises: 100 parts by weight of a rubber component containing natural rubber and/or isoprene rubber; 2 to 7 parts by weight of sulfur; and 2.1 to 10 parts by weight in total of at least one vulcanization accelerator including 0.6 to 8 parts by weight of an N,N-dialkyl-2-benzothiazolylsulfenamide in which two alkyl groups each are a branch-containing straight chain alkyl group of C4-C16, and each of the alkyl groups may be the same as or different from each other.