PROBLEM TO BE SOLVED: To suppress adhesion of a foreign matter to a plant, maintain a saturation deficit suitable for photosynthesis, and suppress generation of temperature difference between upper stage and lower stage of a cultivation shelf.SOLUTION: A plant cultivation device 10 comprises: a blower 14 for sending air in an indoor space in which temperature and humidity are adjusted by an air conditioning device and a humidifier； nozzle bodies 18 each of which is provided on each stage of the cultivation shelf 13, and has an exhaust port 18h for jetting air； and a pipeline 19 for distributing air sent from the blower 14 to each nozzle body 18. The nozzle body 18 has a filter medium 20 for capturing a foreign matter included in air in the indoor space jetted from the exhaust port 18h. The air in the indoor space is jetted from the exhaust port 18h of each nozzle body 18 to an illumination device 17 and plants 15 provided on each stage of the cultivation shelf 13. When the air passes through the filter medium 20, the foreign matter such as dust included in the air is captured by the filter medium 20.SELECTED DRAWING: Figure 4
