Communicating structure between combustor and turbine portion and gas turbine

A communicating structure between

• combustors that generate combustion gas by combusting compressed air supplied from a compressor and fuel supplied from fuel nozzles, which are mixed inside a plurality of pipe pieces disposed next to each other around a rotating shaft, and
• a turbine portion that generates a rotational driving force by making the combustion gas sequentially pass through a turbine stage formed of a plurality of turbine stator vanes and turbine rotor blades disposed around the rotating shaft,
• wherein at least some of first-stage turbine stator vanes closest to the combustors among the turbine stator vanes are disposed downstream of sidewalls of one pipe piece and another pipe piece that are adjacent to each other, and
• the distance from leading edges of the first-stage turbine stator vanes disposed downstream of the sidewalls to end portions of the sidewalls closer to the turbine portion is equal to or less than a spacing between an internal surface of the sidewall of the one pipe piece and an internal surface of the sidewall of the other pipe piece.