The present invention provides a nutrient solution feeding device that enables a nutrient solution to be efficiently supplied to cultivated crops by allowing mixing of raw materials constituting nutrient solution to be tailored to the requirements desired by the user. To this end, the nutrient solution supply device according to the embodiment of the present invention comprises: a first raw material storage part for storing the first raw material, the second raw material and the third raw material which are the raw materials of the nutrient solution； a second raw material storage part； A storage unit； A mixing part for storing a nutrient solution in which raw water and the first to third raw materials are mixed； A first motor unit installed on a conveying path between the mixing unit and the rearing bed to provide power for moving the nutrient solution； A first venturi to a third venturi for allowing the first raw material to the third raw material to move to the mixing portion through movement of the raw water； A second motor part installed on a conveying path connected to the mixing part to provide a nutrient solution mixed with the first venturi to a third venturi； First to third flowmeters and first to third valve units respectively installed on the transfer passages connecting the first to third raw material storage units to the first to third venturi units； A first conveying path to a third conveying path connecting the mixing portion and the first venturi to the third venturi, respectively； And a control unit controlling the first motor unit, the second motor unit, and the first valve unit to the third valve unit so that the supply amounts of the first raw material and the second raw material are the same. As a result, the quality of the nutrient solution can be improved by keeping the ratio of the nutrient solution supplied for the cultivation of crops constant without any error.본 발명은 양액을 이루는 원료들의 혼합이 사용자가 원하는 요구 조건에 맞게 이루어질 수 있도록 하여 재배 작물에 효과적으로 양액이 공급될 수 있
