PROBLEM TO BE SOLVED: To provide a plant cultivation apparatus capable of uniformizing density of photon flux emitted to all plants which are arranged in a cultivation region such that stems are positioned above a lower virtual wall.SOLUTION: A plant cultivation apparatus 1 comprises: a plurality of support pillars 7； and a cultivation rack 3 which is provided by using the support pillars 7 and has a mounting part 4 which mounts a cultivation vessel 2 in which plants P are planted. The cultivation rack 3 comprises a virtual cuboid-shaped cultivation region 15 which is surrounded by six virtual walls 16,17,18,19, and opened in both right and left sides. The plants P are arranged in the cultivation region 15 such that stems are positioned above a lower virtual wall 17. An LED illuminating device 5 having LED lighting fixtures 13 is arranged in the cultivation region 15 so as to be positioned below the upper virtual wall 16 and above the plants P. Reflection members 14, 6, 21 whose reflection surfaces face inside the cultivation region 15 are arranged on the upper virtual wall 16, the lower virtual wall 17, the front virtual wall 18, and the rear virtual wall 19 of the cultivation region 15.【課題】茎が下仮想壁よりも上方に位置するように栽培領域に配置された全植物に発せられる光量子束密度を均一化しうる植物栽培装置を提供する。【解決手段】植物栽培装置１は、複数の支柱７、および支柱７を利用して設けられかつ植物Pが植えられた栽培槽２を載せる載置部４を有する栽培ラック３を備えている。栽培ラック３が、６つの仮想壁16,17,18,19で囲まれ、かつ左右両側方に開放した仮想直方体状の栽培領域15を備えている。植物Pを、茎が下仮想壁17よりも上方に位置するように栽培領域15に配置する。ＬＥＤ灯具13を有するＬＥＤ照明装置５を、上仮想壁16の下方でかつ植物Pよりも上方に位置するように栽培領域15に配置する。栽培領域15の上仮想壁16、下仮想壁17、前仮想壁18および後仮想壁19に、それぞれ反射面が栽培領域15内側を向いた反射部材14,6,21を配置する。【選択図】図３
