The invention relates to adding a plurality of types of agents to automatic , it is possible to control the reaction period , moreover, to provide an automatic drug loading device does not consume lower power consumption or power. An automatic drug dosing device comprises a reaction vessel 1 , a feed storage can 2 mounted above the reaction vessel 1 , and at least one liquid bottle 3 is attached to the side of the feed storage cans 2 , . Is connected to the inner feed -on end and a fluid supply end and the reaction vessel 1 directly or indirectly in the liquid bottle 3 feed storage can 2 , the feed end of the feed reservoir can 2 is an automatic opening and closing device 4 that can be scheduled in addition to the feed and has a water inlet 7 is provided in the side wall of the reaction vessel 1 is provided with a siphon -type liquid intake system for discharging to the outside of the reaction vessel 1 and the mixture inside the reaction vessel 1 to the bottom wall of the reaction vessel 1 . [ Selection Figure ] Figure 1【課題】複数種の薬剤を自動に添加し、反応期間を制御できる、しかも低い電力消費かまたは電力を消費しない自動薬剤添加装置を提供する。【解決手段】自動薬剤添加装置は、反応容器1と、反応容器1の上方に取り付けられた飼料貯蔵缶2と、飼料貯蔵缶2のわきに取り付けられた少なくとも一つの液体びん3と、を備える。飼料貯蔵缶2の飼料投入端と液体びん3の液体供給端とが直接または間接に反応容器1の内部に連結され、飼料貯蔵缶2の供給端は定時に飼料を添加できる自動開閉装置4を有し、反応容器1の側壁に入水口7を設け、反応容器1の底壁に反応容器1内部の混合物を反応容器1の外部に排出させるサイフォン式液体吸排装置を設ける。【選択図】図1
