Problem to be solved: to provide an evaluation valve of an artificial valve ring which can accurately evaluate an artificial valve ring regardless of the degree of experience of the operator in the stage before the sewing.A separating portion 6 capable of being opened and closed at at least one position on the circumference is provided, and an annular body 2 formed in the form of a ring shape in accordance with an artificial valve ring is closed by closing the separating portion 6, and is provided in the premature evaluation instrument 1 of the artificial valve ring.Diagram【課題】人工弁輪をその縫着前の段階で術者の経験度を問わず正確に評価することが可能な人工弁輪の縫着前評価器具を提供する。【解決手段】周上の少なくとも一箇所に開閉可能な分離部６が設けられ、分離部６を閉じることにより人工弁輪に倣った環形状を呈するように形成された環状体２を人工弁輪の縫着前評価器具１に設ける。【選択図】図１
