PROBLEM TO BE SOLVED: To provide a plant growth unit capable of discharging heat generated by a light source to outside, and surely performing blowing to leaves of a plant.SOLUTION: A plant growth unit 100 comprises: a light source 4 for emitting light directed to a terrestrial part 3a of a plant 3； and a partition part 5 for partitioning a space S1 on the light source side and a space S2 on the terrestrial part side, and making steam and light to transmit and restricting transmission of the terrestrial part 3a. The plant growth unit 100 further comprises: an ambient air introduction part 13 for introducing ambient air into the space S2 on the terrestrial part side； and a blowing mechanism 6 for generating an air current to the space S2 on the terrestrial part side. The blowing mechanism 6 is arranged above the terrestrial part 3a, and generates an air current directed from the ambient air introduction part 13 to the blowing mechanism 6 in the space S2 on the terrestrial part side.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】光源が発した熱を外部に排出しつつ、植物の葉への送風をより確実に行うことができる植物育成装置を提供する。【解決手段】植物育成装置１００は、植物３の地上部３ａに向かう光を発する光源４と、光源側の空間Ｓ１と地上部側の空間Ｓ２とを仕切り、水蒸気および光を通過させるが地上部３ａの通過を制限する仕切部５と、を備える。また、植物育成装置１００は、地上部側の空間Ｓ２内に外気を導入する外気導入部１３と、地上部側の空間Ｓ２に気流を生成する送風機構６と、を備える。そして、送風機構６が、地上部３ａの上方に配置されて、地上部側の空間Ｓ２に、外気導入部１３から送風機構６に向かう気流を生成する。【選択図】図１
