FILM COOLING STRUCTURE FOR A TURBINE BLADE OF A GAS TURBINE

The film cooling structure (1) includes: a wall surface (2) along which a heating medium flows; and at least one pair of film cooling holes (3a and 3b) that open at the wall surface (2) and that blow a cooling medium. The pair of film cooling holes (3a and 3b) are arranged to be adjacent to each other in a main flow direction of the heating medium. In addition, perforation directions of the pair of film cooling holes (3a and 3b) are set such that directions of swirls of the cooling medium formed by blowing are opposite to each other, a swirl of the cooling medium on a downstream side in the main flow direction is mixed and merged with another swirl of the cooling medium on an upstream side in the main flow direction, and the merged cooling medium flows along the wall surface in a direction intersecting with the main flow direction.