The present invention relates to a multistage house hydroponic cultivator to cultivate vegetable and, more specifically, to a multistage house hydroponic cultivator, in which a planting plate made of a floatable synthetic resin is disposed on the upper part of a water tub, a fountain is disposed in the upper water tub for humidification in the case of being installed indoors, and a seedbed has a little bit smaller size than an upper inlet of the water tub to float in the water of the water tub in order not to exactly keep a water supply time such that the seedbed is automatically floating on the water by buoyancy in accordance with the height of the water and thus, maintenance is convenient. According to the present invention, the hydroponic cultivator uses an LED to reinforce sunlight and the LED has a color ratio of red light (wavelength of 640 to 660 nm) and blue light (wavelength of 450 nm) by 3:1. The color ratio of the LED can be slightly adjusted based on the characteristics of a plant by a person of ordinary skill in the art. Conventionally, in a veranda of a Korean apartment house, flowers can be cultivated but vegetables cannot be cultivated well due to a narrow space and lack of sunlight and thus, the vegetables are not widely cultivated. Accordingly, a structure of the hydroponic cultivator is improved such that a lot of vegetables can be simultaneously cultivated. Moreover, sunlight is reinforced by the LED and a reflector such that the vegetables can be cultivated in a veranda of an apartment house. Accordingly, when the hydroponic cultivator is commercialized, people can personally cultivate and take fresh non-chemical vegetables for four seasons at low price and thus, high customer′s preference is expected.본 발명은 야채를 키울 수 있는 다단형 가정용 수경재배기에 관한 것으로서, 보다 상세하게는 수조의 상부에는 물에 뜨는 합성수지 소재로 식재판을 구성하였으며, 실내에 배치할 경우 가습을 돕기 위하여 상단의 수조에는 분수대를 구성하였고, 물의 공급시간을 꼭 맞추지 않아도 되게 하기 위하여 모판의 크기는 수조의 상부 입구보다 조금 작게 구성하여 수조의 물에 띄움으로써 높이에 따라 부력으로 자동으로 물에 뜨게 함으로서 유지관리가 편리하게 구성된
