PROBLEM TO BE SOLVED: To provide intermediate breeding equipment in which intrusion of fishes is not permitted, and a discharge method in which natural decrease of young sea cucumbers being bred in the intermediate breeding equipment is reduced.SOLUTION: Intermediate breeding equipment (10A, 10B, 10C) of young sea cucumbers includes substantially square tube-shaped equipment bodies (11A, 11B, 11C) with at least upper surfaces released, and double breeding mats (16) spread on the bottom face of the equipment body. The equipment bodies (11A, 11B, 11C) each have a pocket part (13) for forming a pneumatic stowing space (15) by protruding from one side or both sides of a side wall (12) in a box shape and opening only a lower part.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】魚類の侵入を許容しない中間育成施設及び、中間育成施設で育成した稚ナマコの減耗が少ない放流方法を提供することである。【解決手段】稚ナマコの中間育成施設（10A,10B,10C）であって、少なくとも上面が解放された略角筒状の施設本体（11A,11B,11C）と、前記施設本体の底面に敷き詰められた２重の飼育マット（16）を備え、前記施設本体（11A,11B,11C）は、側壁部（12）の片面又は両面から箱状に張り出して下方のみを開放して空気充填空間（15）を形成するポケット部（13）を有することと特徴とする。【選択図】図１
