PROBLEM TO BE SOLVED: To provide a simple hydroponic cultivation device of a non-nutrient solution circulation type solving nutrient solution degradation and oxygen-shortage.SOLUTION: The phenomenon in which porous and remarkably water absorbable raw materials 3 such as pearlite floating on the nutrient solution 2 of the nutrient solution tank 1 interferes with the nutrient solution tank 1 and obstructs sinking down when naturally sinking down by the evaporation of the nutrient solution 2 by arranging a net 4 between the porous and remarkably water absorbable raw material 3 such as the pearlite and a culture media mat 5 is solved by improving the slidability with the nutrient solution tank 1 by forming point abutting by projecting the net 4 in a longitudinal direction.【課題】養液劣化、酸素不足を解消する非養液循環型の簡易遂行栽培装置を提供。【解決手段】パーライト等の多孔質で吸水性顕著な素材３と培地マット５の間に、ネット４を敷くことにより、養液タンク１の養液２上に浮いたパーライト等の多孔質で吸水性顕著な素材３が、養液２の蒸発により自然沈下する際に養液タンク１と干渉し、沈下を妨げる現象をネット４が格子長手方向が突起していることから、点当たりとなり、養液タンク１との摺動性を向上させる。【選択図】図１
