PROBLEM TO BE SOLVED: To provide a middle layer floating fish reef with a drifting notification device in which seawater may not invade even if a drifting notification device mounted in a fish reef body is always in the condition of being sunk in the sea, and thereby a failure is hard to occur.SOLUTION: A drifting notification device 5 includes a communication processing unit 52 and a power supply unit 53 in the inside of a resin-made float 51. The resin-made float 51 is configured such that small opening faces 51a1, 51b1 of a lower side substantially hemispherical member 51a and an upper side substantially hemispherical member 51b are integrated together by thermo-bonding and are completely closed, and a fish reef body 4 comprises a high pressure resistant resin capable of enduring hydraulic pressure in a floating water depth position. The communication processing unit 52 is connected to the upper part of the power supply unit 53 through a tabular mounting plate 54 smaller than an inner diameter of the resin-made float 51. The power supply unit 53 is fixed in an inner circumferential surface 51a3 of the lower side substantially hemispherical member 51a while the gravity center is positioned on a rotary shaft 51c1.SELECTED DRAWING: Figure 5【課題】魚礁本体に取り付ける漂流通知装置が常時海中に没した状態であっても海水が浸入せず、故障が発生し難い漂流通知装置付き中層浮魚礁を提供する。【解決手段】漂流通知装置５は、樹脂製フロート５１の内部に通信処理部５２と電源部５３とを備え、樹脂製フロート５１は、下側略半球状部材５１ａおよび上側略半球状部材５１ｂの小口面５１ａ１，５１ｂ１同士が熱溶着によって一体化されて完全に閉塞されると共に、魚礁本体４が浮遊する水深位置における水圧に耐え得る高耐圧樹脂からなり、通信処理部５２は樹脂製フロート５１の内径よりも小さい平板状の取付板５４を介して電源部５３の上部に接続され、電源部５３はその重心が回転軸５１ｃ１上に位置する状態で下側略半球状部材５１ａの内周面５１ａ３に固定されている。【選択図】図５
