Abstract: A hydroponic cultivation receptacle comprising a tray 22 having a board 22a to place seeds of small vegetables like sprouts has plural drainage holes 23 on the board 22a and upper rims of said drainage holes 23 to form protrusion 24 so as to retain a little amount of water to dip lower part of the seeds placed on the board 22a. Accordingly, water remained to the height of protrusion 24 retains enough water to keep lower part of the seeds by surface tension while most water provided inside tray 22 drained from the drainage holes 23. Protrusion 24 prevents the seeds from moving from the place they are uniformly placed and the problem of moving of the seeds when water is poured is also solved.