PROBLEM TO BE SOLVED: To provide a plant cultivation device which can automatically perform spraying to a leaf surface at arbitrary timing and arbitrary number of times and can improve production efficiency while suppressing complication of a facility and preventing adverse effect on components.SOLUTION: The plant cultivation device includes: a plurality of cultivation shelves 121 which store a cultivation tray 110； transfer means 130 which performs conveyance of the cultivation tray 110； and spray means 140 which sprays a spraying liquid to a leaf surface of a plant. The spray means 140 is arranged on a conveyance path of the cultivation tray 110 or in a conveyance destination and includes: an isolation member 141 which forms a partitioned space； and a spray nozzle 143 which sprays the spraying liquid toward the inside of the space.【課題】設備の複雑化を抑制し、構成部材への悪影響を防止するとともに、葉面への散布を任意のタイミングや回数で自動的に行うことが可能であり、生産効率を向上することができる植物栽培装置を提供すること。【解決手段】栽培トレイ１１０を格納する複数の栽培棚１２１と、栽培トレイ１１０の搬送を行う移送手段１３０と、植物の葉面に散布用液状体を散布する散布手段１４０とを備え、散布手段１４０は栽培トレイ１１０の搬送経路上あるいは搬送先に配置され、区画された空間を形成する隔離部材１４１と、空間の内部に向けて散布用液状体を散布する散布ノズル１４３とを備えたこと。【選択図】図１
