[Problem] To provide a polymerizable monomer for dental material with which a hardened material having both the properties of high toughness and rigidity can be achieved, and also provide a polymerizable monomer composition for dental material containing said polymerizable monomer, a dental material composition containing said polymerizable monomer composition for dental material, and a hardened material thereof having high mechanical properties. [Solution] A polymerizable monomer (A) for dental material, formed from a urethane acrylate obtained from a specific hydroxyacrylate having suitable flexibility, and a specific diisocyanate having suitable rigidity. Said polymerizable monomer (A) is used to prepare a polymerizable monomer composition for dental material including said polymerizable monomer for dental material, and a dental material composition containing said polymerizable monomer composition for dental material.
