PROBLEM TO BE SOLVED: To provide a unit-type hydroponic apparatus having an advantage in that it allows a facility equipped with the apparatus to have a high degree of flexibility, while being capable of easily stopping water (preventing a water leakage) and easily performing dissipation of heat generated from a light source, when applied to a hydroponic cultivation apparatus of a type in which plants are cultivated so that the root regions of the plants are immersed in nutrient solution.SOLUTION: According to the present invention, a unit-type hydroponic apparatus comprises units 10 formed such that plural spaces 12 adjacent to each other and partitioned by a polygonal wall 11 continuously extended in a substantially horizontal direction. A light source 2 is placed on an upper wall 11a of the polygonal wall 11 of each unit 10 so as to be capable of conducting heat. The upper wall 11a also serves as a lower wall 11b of another unit 10. The lower wall 11b consists of one member that holds a nutrient solution 3 of another unit 10 and continuously extended in the adjacent units 10 in a substantially horizontal direction.SELECTED DRAWING: Figure 1【課題】ユニット型水耕栽培装置の有する設備の自由度が大きいという利点を享有しながら、養液に根域が浸るようにして植物の栽培を行う方式の水耕栽培装置に適用した場合に、止水（水漏れ防止）を行いやすく、また、光源から発生する熱の放散を簡易に行うことができるユニット型水耕栽培装置を提供すること。【解決手段】略水平方向に連続する多角形壁１１で仕切られた空間１２が複数隣接する形でユニット１０が形成されたユニット型水耕栽培装置に関するもので、各ユニット１０における多角形壁１１の上方壁１１ａに光源２が熱伝導可能に設置され、この上方壁１１ａが他のユニット１０の下方壁１１ｂを兼ねており、この下方壁１１ｂが他のユニット１０の養液３を保持するものであり、かつ、略水平方向に隣接し合うユニット１０と連続する１つの部材からなるようにする。【選択図】図１
