An air supply device that can be applied to various greenhouses and that can be easily installed is provided. SOLUTION: A large number of crops are cultivated in a greenhouse, and an air supply device 100 is installed at an appropriate position therebetween. If the air supply duct 120 is contracted, the air supply device 100 can easily move in the greenhouse. After the installation, the air supply duct 120 is extended toward the ceiling, and the upper opening 122 thereof is set to a desired height. When the motor 132 is driven to rotate the air supply fan 130, warm air near the ceiling of the greenhouse is sucked into the air supply duct 120 from the upper opening 122 of the air supply duct 120, and the ground comes from below the movable carriage 110. And is sent out laterally from between the legs 116 of the mobile carriage 110. Thus, the warm air on the ceiling side of the greenhouse mixes with the low-temperature air on the ground side of the greenhouse. [Selection diagram] Fig. 1【課題】様々な温室に適用することが可能で、設置も容易な送気装置を提供する。【解決手段】温室内には作物が多数栽培されており、それらの間の適宜位置に、送気装置１００が設置される。送気ダクト１２０を縮めるようにすれば、簡単に温室内を送気装置１００が移動できる。設置後は、送気ダクト１２０を天井の方に伸ばし、その上部開口１２２を所望の高さとする。モーター１３２を駆動して送気ファン１３０を回転させると、温室の天井付近の暖かい空気が、送気ダクト１２０の上部開口１２２から送気ダクト１２０内に吸い込まれるとともに、移動台車１１０の下方から地面側に送出され、移動台車１１０の脚１１６の間から、横方向に送り出される。これにより、温室の天井側の暖かい空気が、温室の地面側の低温の空気に混ざるようになる。【選択図】図１
