PROBLEM TO BE SOLVED: To provide a spawning bed for Japanese rice fish addressing the necessity of multiple eggs and a spawning bed for observation and study of the rice fish performed in elementary schools, being easily procured, and allowing a person to efficiently collect eggs, thereby performing the observation and study thereof.SOLUTION: Conditions of the spawning bed on which the rice fish preferably lays eggs are found using the habit of the rice fish and an artificial spawning bed is created. The artificial spawning bed is connected to a support frame with a float member for holding the bed at a normal position under favorable conditions, the support frame being easily attached/detached and easily observed. The artificial spawning bed device for the rice fish that is useful for the observation and study and from which eggs are easily collected is thus provided.【課題】小学校で実施するメダカの観察や研究に於いて数多くの卵や産卵床を必要とするため、調達しやすく効率的に採卵が出来て観察や研究ができるメダカの産卵床に関する。【解決手段】メダカの習性を利用し好んで産卵をする産卵床の条件を見出して人工産卵床を創作し、その人工産卵床を条件の良い場所に定位保持しておく簡単に着脱できる観察しやすい浮き部材つき支持枠に連結し、観察、研究に役立つ採卵のしやすいメダカ用人工産卵床装置を提供する。【選択図】図１
