PROBLEM TO BE SOLVED: To provide a plant cultivation device which can improve work efficiency.SOLUTION: The plant cultivation device includes a lighting fixture 5 that is disposed to be able to adjust its height and irradiates a plant with artificial light, a projection part 15 that projects from a side face of the lighting fixture 5, and a light reflection plate 20 that is disposed outside a side portion of the lighting fixture 5 and includes a slit 20s allowing the projection part 15 to pass through so that it can move vertically.【課題】作業効率を高くすることができる植物栽培装置を提供する。【解決手段】高さを調節可能に配置され、植物に人工光を照射する照明器具５と、前記照明器具５の側面から突出する突出部１５と、前記照明器具５の側部外側に配置され、前記突出部１５を上下に移動可能に通すスリット２０ｓを含む光反射板２０と、を含む。【選択図】図７
