The utility model discloses a hydroponic device, including the water planting container body, the water planting container body is made for transparent material, the upside of water planting containerbody has cup jointed the field planting external member, the field planting external member is made for transparent material, the field planting external member includes planting plate and field planting crown plate, planting plate sets up the upper portion of field planting crown plate, planting plate with field planting crown plate integrated into one piece, growth along with the plant, adjustable plant braced frame's height, avoid the plant at the heavy in -process of change of growing, empty easily, be unfavorable for growth, growth along with the plant root system, regulation telescopiccanular rods provides sufficient vertical space for the root system of plant, make the root system can not twine together by the crossgrowth, the air duct makes the inside nutrient solution of water planting container body fully contact with the air, prevent aerobic plant root system oxygen deficiency, influence the growth of plant.