A turbine vane of a multi-stage arrangement of turbine vanes cooled by compressed air supplied from a compressor of a gas turbine has an improved structure capable of preventing an unintended removal of cooling holes along with the intended removal of an excess portion of a shroud. The turbine vane includes an airfoil configured to be installed on an inner peripheral surface of a turbine casing in which combustion gas supplied from a combustor flows and to guide combustion gas from a front-stage blade to a rear-stage blade; and a pair of shrouds coupled to the airfoil, at least one of the shrouds having a plurality of cooling holes formed toward the airfoil, wherein the plurality of cooling holes are formed along an imaginary line that is spaced apart from and surrounds the airfoil.