To provide a spawning bed that improves efficiency furthermore, and is easy to access for killifish.SOLUTION: A spawning bed 1 includes multiple porous rectangular members 2, and is constituted by being fixed while one end 6a of the multiple porous rectangular members 2 are arranged substantially. Then, the length of the porous rectangular members 2 is shortened as going to an outer edge from a center in the spawning bed 1. Sponge members are used as the porous rectangular members 2. Also, the fixation of one end 6a of the multiple porous rectangular members 2 is performed by using a disk-shaped sponge member (fixing member 3) with a circular hole opened in the central part.SELECTED DRAWING: Figure 1【課題】効率をより向上させ，メダカがアクセスしやすい産卵床を提供する。【解決手段】産卵床１は，複数の多孔質長方形状部材２を備え，複数の多孔質長方形状部材２の一端部６ａがほぼ揃った状態で固定されて構成されている。そして，当該産卵床１においては，多孔質長方形状部材２の長さが，中心から外縁に向かうにつれて短くなっている。多孔質長方形状部材２としては，スポンジ部材が用いられている。また，複数の多孔質長方形状部材２の一端部６ａの固定は，中央部に円孔の開いた円盤状のスポンジ部材（固定部材３）を用いて行われている。【選択図】図１
