Provided is a plant cultivation device having a rack, an air duct, an illumination unit, and a gas supply unit. The rack has a shelf on which a plurality of plants are disposed. The illumination unit emits artificial light from above to the plurality of plants. The air duct has a plurality of spray nozzle openings. The gas supply unit applies static pressure to the inside of the air duct, thereby causing a gas to be sprayed through the plurality of spray nozzle openings and onto the plants.
