Gas turbine

A gas turbine comprising:

• a housing;
• a turbine blade provided in the housing and configured to be rotated by combustion gas;
• a turbine vane configured to guide a flow of the combustion gas toward the turbine blade, the turbine vane having a turbine vane cooling passage for delivering cooling fluid to an inner wall of the turbine vane;
• and
• an impingement plate installed in the turbine vane cooling passage, the impingement plate having a plurality of injection holes through which the cooling fluid is injected onto the inner wall of the turbine vane,
• wherein the injection holes comprise:
• an upstream-side injection hole disposed at an upstream side with respect to a flow direction of the cooling fluid in an impingement space defined between the impingement plate and the inner wall of the turbine vane;
• and
• a downstream-side injection hole disposed at a downstream side with respect to the flow direction of the cooling fluid in the impingement space, and
• wherein the upstream-side injection hole and the downstream-side injection hole are formed not to overlap with each other with respect to the flow direction of the cooling fluid in the impingement space.