To provide a hydroponic device in which an air supply passage is easily handled and thereby being conveniently used even when a case having a nursery bed is formed to be drawable and storable with respect to a cultivation device body.

A hydroponic device comprises: a cultivation device body including an air pump; a case which is drawable and storable with respect to the cultivation device body, which has a nursery bed, and in which a cultivation nutrient liquid is pooled; and an air supply passage which supplies the cultivation nutrient liquid pooled in the case with air from the air pump. The air supply passage includes: a body side air supply passage which is disposed in the side of the cultivation device body and connected with the air pump; and a case side air supply passage which is disposed in the side of the case. The case side air supply passage is separated from or connected with the body side air supply passage according to an operation to draw the case out of or store it in the cultivation device body.