it is supported in the tray by the tapered portion as shown in fig6 plural holes 33a are provided throughout said board 33 at given intervals in the domestic cultivation of sprouts or water cress an appropriate water supply is essential for preventing the vegetables from spoiling however it is difficult to provide a suitable amount of water with the use of conventional receptacles as shown in fig6 in the conventional cultivation receptacle 31 water must be supplied at a level where seeds are dipped at the bottom i e a slightly upper level than the upper surface of the board 33 lower than that level will result in drying of the seeds and upper than that level such that the seeds are completely soaked with water will result in rotting of the seeds with the foregoing difficulty of the conventional cultivation receptacle in mind there is proposed a hydroponic cultivation receptacle in which seeds are placed on a sponge mat instead of a board material and water can be supplied under capillary action however the sponge mat of multi porous structure is susceptible to propagation of bacteria and is thus insanitary further there is also a problem that chemical components contained in the mat dissolve in water and contaminate the crops the cultivation receptacle 33 has further drawbacks in that dust may enter from the open end of the tray and in that the water in the tray will.