PROBLEM TO BE SOLVED: To provide an air blowing device of a plant cultivation apparatus in which supply of appropriate air stream and humidification to domesticated plants by each plant cultivation shelf can be realized by a relatively simple structure.SOLUTION: An air blowing device 1 blows air to a plurality of stages of plant cultivation shelves 61 in a cultivation shelf frame 6, and comprises: an air-blow fan part 2 which is arranged on an upper side and blows air downward； a humidifier 3 which generates humidified air； an air channel 12 which sends the humidified air to the air-blow fan part 2； an air guide part 13 which adjusts a course of air sent out downward from the air-blow fan part 2 and gives air stream to the plant cultivation shelf 61 of each stage.
