PROBLEM TO BE SOLVED: To provide a plant cultivation device capable of measuring the weight of a plant simply and as many times as possible, and maintaining a closed environment.SOLUTION: A plant cultivation device comprises: an airtight container 1 a storage tank 2 which is arranged in the airtight container 1 and pools nutritious liquid for cultivating plants 50 a cultivation tank 3 which is arranged in the airtight container 1 and to which nutritious liquid is supplied from the storage tank 2, and cultivates the plants and a weight detector 11 which detects the weight of the storage tank 2 and the cultivation tank 3.COPYRIGHT: (C)2016,JPO&INPIT【課題】植物の重量を簡単に何度でも計測できると共に、閉鎖環境を維持できる植物栽培装置を提供すること。【解決手段】植物栽培装置は、密閉容器1と、密閉容器1内に配置されると共に、植物50を栽培するための養液を貯留する貯留槽2と、密閉容器1内に配置されると共に、貯留槽2から養液が供給されて、植物を栽培する栽培槽3と、貯留槽2および栽培槽3の重量を検知する重量検知装置11とを備える。【選択図】図1