[Aim] Provided is a hydroponic apparatus that is lightweight, has a simple structure, and is easily manufactured and installed. [Solution] A hydroponic apparatus (1), which is used to hydroponically cultivate plants such as vegetables, includes a cultivation bed (10) that is used to cultivate the plants, and a supporting unit (20) that supports the cultivation bed (10) at a predetermined height. The cultivation bed (10) and the supporting unit (20) are formed of foamed plastic. The cultivation bed (10) includes a water tank (11) that extends in one direction, for example, and a planting plate (12) that is disposed detachably on the water tank (11), and a circulation unit (13) is formed inside the cultivation bed to circulate a liquid fertilizer. The water tank (11) is formed by bonding water tank dividing members (11A and 11B) from each other, the water tank dividing members being divided into plurality in a lengthwise direction, for example.
