To provide a rubber composition for tire tread which has excellent abrasion resistance and excellent heat resistance, and furthermore reduces lower ing in performance with traveling distance, particularly lowering in grip, and especially a tread rubber composition for studless tire suited in traveling on the frozen road surface and the snow road surface.

The rubber composition for tire tread comprises 100 pts.wt. rubber component comprising ≥80 wt.% at least one kind of a natural rubber, a synthetic polyisoprene rubber and a polybutadiene rubber and 0.05-0.21 pts.wt. sulfur and, in addition, an organic peroxide in an amount so that its active oxygen content (Y) comes to not less than 8 wt.% of the compounding amount (X) of the sulfur.