PROBLEM TO BE SOLVED: To provide a fish reef outflow warning device that can reliably detect levitation to the sea surface.SOLUTION: A fish reef outflow warning device 10 for use in a middle layer floating fish reef concerning the present invention includes levitation detection means 14, 20 for detecting levitation of itself, and warning means 21, 22 for notifying the levitation to a user. The levitation detection means 14, 20 comprise multiple switches constituted so as to detect different physical quantity, respectively, and turn on power supply into the warning means 21, 22. At least one switch is stored in the inside of the fish reef outflow warning device 10.SELECTED DRAWING: Figure 1【課題】海面への浮上を確実に検知することが可能な漁礁流出警報装置を提供する。【解決手段】本発明に係る中層浮漁礁用の漁礁流出警報装置１０は、自機の浮上を検知する浮上検知手段１４、２０と、その浮上を使用者に報知するための警報手段２１、２２とを備えており、浮上検知手段１４、２０は、それぞれ異なる物理量を検知して警報手段２１、２２に電源を投入するように構成された複数のスイッチ部を含み、少なくとも１つのスイッチ部は、漁礁流出警報装置１０の内部に収容されている。【選択図】図１
