PROBLEM TO BE SOLVED: To increase the amount of cultivation per cultivation space.SOLUTION: The plant cultivation device comprises cultivation containers (22) arranged on a plurality of vertical levels, and relay piping (34) provided at a position between a first end part and a second end part on the opposite side to the first end part in a direction which connects the first and second ends. The lower part of the relay piping (34) comprises a spout (34b) that moves out of the movement path of a cultivation plate (23) when pressed by the cultivation plate (23) when the cultivation plate (23) is being put in or taken out.SELECTED DRAWING: Figure 6【課題】栽培スペース当たりの栽培量を多くする。【解決手段】植物栽培装置は、上下複数段に栽培容器（２２）が配置され、中継配管（３４）は、第１端部と第１端部とは反対側の第２端部とを結ぶ方向における第１端部と第２端部との間の位置に設けられ、中継配管（３４）の下部は、栽培プレート（２３）の出し入れの際に、栽培プレート（２３）に押されて栽培プレート（２３）の移動経路外へ移動する注ぎ口（３４ｂ）である。【選択図】図６
