PROBLEM TO BE SOLVED: To provide a plant cultivating apparatus capable of efficiently accelerating high-accuracy cultivation experiment or research at a low cost.SOLUTION: In a plant cultivating apparatus, a growing space 12 which is partitioned from outside in a minimum range housing a predetermined minimum number of plants is formed inside an apparatus body 11, and the apparatus comprises weight measuring means capable of measuring the weight of plants in the state where the plants are housed in the growing space 12. The weight measuring means comprises: a weight sensor 21 which measures the weight of a part to be measured being a culture tank 13 of the apparatus body 11 including the plants for each weight of the plants and a computing part (control unit 100) which calculates only the weight of plants by subtracting an amount equivalent to the weight of the part to be measured itself other than the plant from a measured value by the measuring instrument 21.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】低コストで精度の高い栽培実験や研究を効率良く促進させることができる植物栽培装置を提供する。【解決手段】装置本体11の内部に、所定の最小株数の植物を収納する最小限の範囲で外部から区画された生育空間12が形成され、生育空間12に植物を収納したままの状態で、該植物の重量を測定可能な重量測定手段を備える。重量測定手段は、植物を含む前記装置本体11の培養槽13である被測定部の重量を植物の重量ごと測定する重量センサ21と、測定器21による測定値から植物以外の前記被測定部自体の重量分を減算して植物のみの重量を算出する演算部(コントロールユニット100)とを備える。【選択図】図1