The present invention relates to a graft copolymer, and to a core-shell type graft copolymer comprising a core comprising a rubbery polymer; and a shell formed by graft polymerizing a graft monomer to the rubbery polymer, wherein the rubbery polymer comprises a conjugated diene-based monomer unit, the graft copolymer comprises the core in 75 wt % to 83 wt %, and a thickness of the shell is 3 nm to 25 nm, a curable resin composition comprising same, and an adhesive composition.