PROBLEM TO BE SOLVED: To provide an addition liquid supply device capable of improving convenience for a user and a fine bubble generator comprising the same.SOLUTION: There is provided an addition liquid supply device for supplying an addition liquid to a circulation channel which extends from a suction hole to a discharge hole so as to suck a liquid in a bathtub from the suction hole provided on a wall face of the bathtub and discharge the liquid sucked from the discharge hole provided on the wall face, the addition liquid supply device comprising: an addition liquid storage case which is a case for forming a storage space for storing the addition liquid, which has an open hole for communicating the storage space and an outside, and is detachably attached to the suction hole and a cover which is detachably attached to the suction hole so as to cover, at least partially, a side on the addition liquid storage case which is exposed to inside of the bathtub.SELECTED DRAWING: Figure 4ACOPYRIGHT: (C)2018,JPO&INPIT【課題】ユーザの利便性を向上させることができる添加液供給装置およびそれを備える微細気泡発生装置を提供すること。【解決手段】浴槽の壁面に設けられた吸込口から前記浴槽内の液体を吸い込むとともに吸い込んだ液体を前記壁面に設けられた吐出口から吐出させるように前記吸込口から前記吐出口まで延びる循環流路に添加液を供給するための添加液供給装置は、添加液を貯留するための貯留空間を形成するケースであって、前記貯留空間と外部を連通する貫通孔を有し、前記吸込口に着脱自在に取り付けられる添加液貯留ケースと、前記添加液貯留ケースにおける前記浴槽内に露出する側を少なくとも部分的に覆うように前記吸込口に着脱自在に取り付けられるカバーと、を備える。【選択図】図4A
