Gas-blast circuit breaker

A gas-blast circuit breaker comprising

• at least one heat removal unit disposed in a flow path of arc extinguishing gas,
• wherein the at least one heat removal unit each includes:
• a plurality of plate-shaped heat removal members each contacting the arc extinguishing gas flowing in the flow path to perform heat removal to the arc extinguishing gas;
• and
• a holding portion holding the plurality of plate-shaped heat removal members in a manner to stack the plurality of plate-shaped heat removal members at intervals with each other in a thickness direction,
• wherein each of the heat removal members includes:
• an upstream side end portion provided on an upstream side in a flow direction of the arc extinguishing gas;
• a downstream side end portion provided on a downstream side in the flow direction;
• and
• a thickest portion with a largest thickness which is provided between the upstream side end portion and the downstream side end portion,
• wherein a thickness of the heat removal member continuously changes between the upstream side end portion and the downstream side end portion via the thickest portion.