Disclosed is a cooling structure for a structural body, which configures a turbine. A cooling flow path meanders around a flow direction of the high temperature combustion gas, wherein the cooling flow path is formed in a space between the turbine wall surfaces by a partition wall and a plurality of ribs. An inflow path for a cooling air is formed inside of the structural body in which the cooling flow path extends in a direction substantially perpendicular to the axial direction. At least one straight flow path is provided with intervals substantially in the axial direction between the ribs. A turning flow path joins the ends of the inflow path with the straight flow path. In this way, the cooling performance is improved.
