A plant cultivation device cultivates plants inside a greenhouse. Gutter shaped cultivation beds and a water supply unit that supplies water inside the cultivation beds are provided inside the greenhouse. The cultivation beds are provided with a cultivation bed main body with a drainage outlet provided at one end in the longitudinal direction and a heat insulating coating on side surfaces covering the side surfaces of the cultivation bed main body. When, for example, sunlight strikes one part of the cultivation bed, that part is prevented from local temperature increases by the heat insulating coating, and heat distribution in the longitudinal direction of the cultivation bed can be made more uniform.本發明之植物栽培裝置係於溫室內部栽培植物。於溫室之內部設置流槽狀之栽培床、及對栽培床內部供給水之供水部。栽培床包括於長度方向之一端部設置有排水口之栽培床本體、及覆蓋栽培床本體側面之側面部之隔熱塗料。藉由隔熱塗料,於例如太陽光照射至栽培床之一部分之情形時,可防止該部分之溫度局部上升,從而可使栽培床之長度方向之溫度分佈更均一。7‧‧‧栽培床20‧‧‧保水片21‧‧‧供水配管22‧‧‧防根片23‧‧‧培養基25‧‧‧栽培床本體26‧‧‧隔熱塗料27‧‧‧隔熱塗料S1‧‧‧外側面S2‧‧‧內側面S3‧‧‧外側面S4‧‧‧內側面X‧‧‧軸Y‧‧‧軸Z‧‧‧軸
