The utility model provides a water culturing device. According to the water culturing device, a culturing chamber and a light source chamber which are mutually isolated are formed in a culturing device body. A seedbed can be placed in the culturing chamber. A light source capable of illumining the seedbed from the upper portion is arranged in the light source chamber. The water culturing device is provided with a first ventilation system passing through the culturing chamber and enabling air from the outer portion of the culturing device body to be circulated, a second ventilation system passing through the light source chamber and enabling air from the outer portion of the culturing device body to be circulated and a single ventilation fan forcing air to circulate in the first ventilation system and the second ventilation system.一種水耕栽培裝置,在其栽培裝置主體中形成有相互隔離的栽培室和光源室,栽培室中能放置苗床,光源室中設有從上方朝苗床照射光的光源,具有從栽培室內通過、供來自栽培裝置主體外的空氣流通的第一通氣系統;以及從光源室內通過、供來自栽培裝置主體外的空氣流通的第二通氣系統,設有強制性地使空氣在第一通氣系統及第二通氣系統中流通的單個通氣扇。1‧‧‧水耕栽培裝置2‧‧‧栽培裝置主體3‧‧‧盒體4‧‧‧苗床5‧‧‧光源裝置6‧‧‧通氣系統形成箱7‧‧‧底壁8‧‧‧右側壁9‧‧‧左側壁10‧‧‧後壁11‧‧‧頂壁14‧‧‧栽培室15‧‧‧收納部16‧‧‧引導部17‧‧‧保持部18‧‧‧光源室19‧‧‧LED20‧‧‧LED保持體21‧‧‧分隔壁37‧‧‧底板38‧‧‧後板40‧‧‧右板41‧‧‧左板56‧‧‧外側孔61‧‧‧浮力用空間62‧‧‧導入口形成用縱箱部63‧‧‧排氣口形成用縱箱部64‧‧‧連通用橫箱部74‧‧‧側部立壁75‧‧‧側部立壁77‧‧‧導入口用膨出部80‧‧‧供氣用通氣孔81‧‧‧供氣用過濾器82‧‧‧排氣用通氣孔83‧‧‧排氣用過濾器84‧‧‧通氣扇87‧‧‧排氣口用膨出部91‧‧‧第一通氣道92‧‧‧第二通氣道95‧‧‧連通開口部98‧‧‧上部橫壁99‧‧‧傾斜壁100‧‧‧水平壁AR1‧‧‧空氣AR2‧‧‧空氣