Combustor cartridge, combustor, and gas turbine

The combustion cylinder (20) is provided with a cylindrical main body (21) and an air supply pipe (40). An insertion opening (25) and a plurality of cooling flow paths (30) are formed in the main body. A part of the air supply pipe is inserted from the insertion opening to the inner peripheral side of the main body. A collision region flow path (33i), which is a part of the plurality of cooling flow paths, has a collision region bypass flow path section (34i). The collision region bypass flow path portion intersects with a collision gas axis (Ai) extending in a flow direction of combustion gas flowing toward a tube center axis (At) of the air supply tube, and extends from the collision gas axis in a direction having an upstream direction component along an edge of the insertion opening. And extends from the collision gas axis in a direction having a downstream direction component along an edge of the insertion opening. In the collision region bypass flow path portion, no outlet is formed in a portion within a