PROBLEM TO BE SOLVED: To provide a multistage cultivation device which has an energy-saving effect by effectively utilizing sunlight, and which can cultivate plants at low cost and with high cultivation efficiency by increasing a total cultivation area even in narrow spaces including a rooftop and veranda.SOLUTION: In a multistage cultivation device in which a cultivation shelf 1 is disposed on multiple stages in a height direction, at least one side face serves as a lighting face, a light reflector 8 is obliquely installed between each cultivation shelf 1 for reflecting light transmitted through the lighting face to cultivated plants 3 on the cultivation shelf 1, and an inclination angle θ of each light reflector 8 is set in the range of 20 to 90°. Because the light transmitted through the lighting face is reflected from the light reflector 8 and then irradiated to the cultivated plants 3 on the cultivation shelf 1, the plants can be cultivated by effectively utilizing sunlight without depending on artificial lighting in the daytime. In addition, because the inclination angle θ is set in the range of 20 to 90°, sunlight which is certainly reflected from the light reflector 8 can be effectively utilized in cultivating the plants even in the northernmost point of Japan.COPYRIGHT: (C)2015,JPO&INPIT【課題】日光を有効利用することで省エネルギー効果が得られるようにし、屋上やベランダ等の狭い場所でも栽培延べ面積を拡張して高い栽培効率で植物を安価に栽培できるように図った多段式栽培装置を提供する。【解決手段】栽培棚1が高さ方向に多段に配置された多段式栽培装置であって、少なくとも一側面が採光面とされ、この採光面を透過した光を栽培棚1の栽培植物3に向かって反射する光反射体8が各栽培棚1の相互間に傾斜して設置され、各光反射体8の傾斜角θが20°~90°の範囲に設定された構成とする。採光面を透過した光が光反射体8で反射されて栽培棚1の栽培植物3に照射されるので、日中は人工照明に頼ることなく日光を有効利用して植物を栽培でき、傾斜角θを20°~90°に設定したため日本の最北端の地でも日光を光反射体8で確実に反射して植物の栽培に有効利用できる。【選択図】図2
