PROBLEM TO BE SOLVED: To provide a hydroponic cultivation method in which algae etc. are suppressed from being generated in a culture solution by blocking the invasion of light into a cultivation tank or the like, and cleaning of the cultivation tank or the like is almost unnecessary. SOLUTION: One or more first light-shielding first tubular body 10 having a plurality of holes on a side surface, and a second light-shielding tubular body having a plurality of holes provided on the side surface and having a plurality of holes on a side surface. 11, the distance between the holes of the second tubular body 11 is wider than the distance between the holes of the first tubular body 10, and the passage between the first tubular body 10 and the second tubular body 11 is further provided. It is a hydroponic cultivation method using the cultivation apparatus 1, and a step of inserting a tubular member in which a plant support supporting a plant seedling is inserted into a hole of the first tubular body 10, and depending on a plant to be cultivated. After the first cultivation period has elapsed, in the passage, the tubular member is extracted from the first tubular body 10 and inserted into the hole of the second tubular body 11 on the opposite side across the passage, and Harvesting the plant after the cultivation period has elapsed. [Selection diagram] Figure 1【課題】栽培槽等への光の侵入を遮断することによって培養液に藻等が発生するのを抑え、栽培槽等の清掃がほとんど不要となる水耕栽培方法を提供する。【解決手段】側面に複数の孔を有する遮光性の１以上の第１管状体１０と、第1管状体１０の本数より多く設けられ、側面に複数の孔を有する遮光性の第２管状体１１とを備え、第２管状体１１の孔同士の間隔は第１管状体１０の孔同士の間隔より広く、第１管状体１０と第２管状体１１の間の通路とをさらに備える水耕栽培装置１を用いた水耕栽培方法であって、第１管状体１０の孔に、植物の苗を支持する植物支持体が挿入された筒状部材を挿入するステップと、栽培する植物に応じた第１栽培期間を経過した後、通路において、筒状部材を前記第１管状体１０から抜き取って、通路を挟んで逆側にある第２管状体１１の孔に挿入するステップと、第２栽培期間を経過した後、植物を収穫するステップとを含む。【選択図】図１
