The present invention relates to a resin composition including (1) 80 wt % to 99.8 wt % of a butadiene-based graft copolymer mixture; (2) 0.1 wt % to 10 wt % of a graft copolymer including a derived unit from a polyolefin-based polymer, a derived unit from a vinyl cyanide compound and a derived unit from an aromatic vinyl-based compound; and (3) 0.1 wt % to 10 wt % of an alpha olefin-based copolymer.