PROBLEM TO BE SOLVED: To provide a feeding device that can stably perform a feeding operation even under the humid environment, and also can avoid increase in size of the feeding device and increase of energy for facility operation, and then provide a feeding method and a growing method using the same.SOLUTION: A feeding device 100 includes: a water supply path 30 having multiple drain outlets 31 capable of draining water toward an aquaculture tank 20 in a warming house 10; a pump 32 being water supply means for supplying water to the water supply path 30; a blower 50 being blowing means for making powdery or granular feed F reserved in a hopper 40 get mixed in air flow and delivering it to a feeding path 51; and a powder separator 60 being feed separation means arranged between the feeding path 51 and the water supply path 30 in order to separate the feed F from a feed mixture air flow delivered via the feeding path 51 and send it into the water supply path 30.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】湿度の高い環境下においても安定的に給餌作業を行うことができ、給餌装置の大型化、施設稼働用エネルギーの増大を回避することもできる給餌装置及びこれを使用した給餌方法、育成方法を提供する。【解決手段】給餌装置100は、保温ハウス10内の養殖水槽20に向かって排水可能な複数の排水口31を有する送水経路30と、送水経路30に給水する給水手段であるポンプ32と、ホッパー40に貯留した粉状又は粒状の飼料Fを空気流に混入させ送餌経路51へ送給する送風手段であるブロワー50と、送餌経路51を経由して送給される飼料混合空気流から飼料Fを分離して送水経路30へ送り込むために送餌経路51と送水経路30との間に配置された飼料分離手段である粉末分離器60と、を備えている。【選択図】図1