Rubber composition for tire tread and pneumatic tire using the same

The present invention provides a rubber composition for a tire tread, which is excellent in fuel efficiency and wet grip performance, without losing properties such as processability and mechanical strength, and a pneumatic tire comprising the rubber composition. [0002] Specifically, the present invention provides a rubber composition for a tire tread comprising 100 parts by weight of a rubber component containing at least 5 % by weight of natural rubber graft-copolymerized with an organic compound having an unsaturated bond and/or epoxidized natural rubber, and 5 to 150 parts by weight of carbon black and/or silica with a nitrogen-absorbing specific surface area of 100 to 300 m/g.