A film cooling structure comprising: a wall surface along which a heating medium flows; and at least one pair of film cooling holes that open at the wall surface and that are used to blow a cooling medium, wherein the pair of film cooling holes are arranged to be adjacent to each other in an X-axis direction representing a main flow direction in which the heating medium flows along the wall surface, wherein the pair of film cooling holes are arranged at different positions in the X-axis direction, the pair of film cooling holes on the wall surface are arranged at different positions in the X-axis direction and in a Y-axis direction that is orthogonal to the X-axis direction and that is parallel to the wall surface, perforation directions of the pair of film cooling holes 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 X-axis direction is mixed and merged with another swirl of the cooling medium on an upstream side in the X-axis direction, and the merged cooling medium flows along the wall surface in a direction intersecting with the X-axis direction, characterized in that in the pair of film cooling holes, a perforation direction of a first cooling hole on the upstream side in the X-axis direction is set in a first plane orthogonal to the X-axis direction, and a perforation direction of a second cooling hole on the downstream side in the X-axis direction is set in a second plane orthogonal to the X-axis direction, a first angle (γ1) of the perforation direction of the first cooling hole with respect to the wall surface in the first plane is set to be different from a second angle of the perforation direction of the second cooling hole with respect to the wall surface in the second plane, and a difference between the first angle and the second angle is set within a range greater than 100° and less than 120°. a wall surface along which a heating medium flows; and at least one pair of film cooling holes that open at the wall surface and that are used to blow a cooling medium, wherein the pair of film cooling holes are arranged to be adjacent to each other in an X-axis direction representing a main flow direction in which the heating medium flows along the wall surface, wherein the pair of film cooling holes are arranged at different positions in the X-axis direction, the pair of film cooling holes on the wall surface are arranged at different positions in the X-axis direction and in a Y-axis direction that is orthogonal to the X-axis direction and that is parallel to the wall surface, perforation directions of the pair of film cooling holes 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 X-axis direction is mixed and merged with another swirl of the cooling medium on an upstream side in the X-axis direction, and the merged cooling medium flows along the wall surface in a direction intersecting with the X-axis direction, characterized in that in the pair of film cooling holes, a perforation direction of a first cooling hole on the upstream side in the X-axis direction is set in a first plane orthogonal to the X-axis direction, and a perforation direction of a second cooling hole on the downstream side in the X-axis direction is set in a second plane orthogonal to the X-axis direction, a first angle (γ1) of the perforation direction of the first cooling hole with respect to the wall surface in the first plane is set to be different from a second angle of the perforation direction of the second cooling hole with respect to the wall surface in the second plane, and a difference between the first angle and the second angle is set within a range greater than 100° and less than 120°.