To provide an exhaust hood enabling efficient air exhaust without diffusing hot air generated from a heat source such as a kitchen, and alleviating wear due to hot air current.

By continuously changing the blowout direction of outside air from an air supply part from the directly underneath direction to the hood interior lower direction, a lid of outside air expanded below the hood to have a mountain shape is formed, so as to prevent diffusion of hot air, and at the same time, to alleviate ascending current.