TURBINE BLADE AND GAS TURBINE

A turbine blade (1400, 2400, 3400) comprises an airfoil (1410, 2410, 3410) having a suction side (S1) and a pressure side (S2), a platform (1420) coupled to a bottom of the airfoil (1410, 2410, 3410), and a root (1425) coupled to a rotor disk (1310) by protruding downward from the platform (1420). The airfoil (1410, 2410, 3410) comprises a cooling passage (CP) formed therein and a discharge hole (1460, 2460, 3460) connected to an upper portion of the cooling passage (CP) to discharge cooling air. The discharge hole (1460, 2460, 3460) is inclined toward a tip of the turbine (1300, 1400) blade (1400, 2400, 3400) while extending from an inside to an outside thereof.