<p>A plant growing device is provided with: a container (1) in which nutrient solution (F) accumulates at the bottom part; a holding unit (2) that holds plants (P) within the container (1); spray units (3) that spray the nutrient solution (F) within the container (1); and support units (5) that support the holding unit (2) and move the holding unit (2) so as to be positioned according to a drive state for the spray units (3) in a range from a spray region (D1) in which the nutrient solution (F) sprayed by the spray units (3) is supplied to roots (Q) of the plants (P) to an immersion region (D2) in which the nutrient solution (F) accumulated in the container (1) is supplied to the roots (Q) of the plants (P).</p>
