Curable resin composition for photoshaping, cured product, and three-dimensionally shaped object

The present invention provides a curable resin composition for photoforming, which contains a urethane resin (A) having a (meth) acryloyl group and a photopolymerization initiator, and wherein the content of the (meth) acryloyl group in the urethane resin (A) is 0.8-2.2 gol/g (inclusive). This curable resin composition for photoforming is capable of forming a cured product having a low viscosity, a large elastic modulus and impact strength, and excellent impact resistance that changes little over time. 本发明提供以下的光造形用固化性树脂组合物，其含有具有(甲基)丙烯酰基的氨基甲酸酯树脂(A)和光聚合引发剂，上述氨基甲酸酯树脂(A)中的(甲基)丙烯酰基的含量为0.8mmоl/g以上且2.2mmоl/g以下。该光造形用固化性树脂组合物为低粘度、且能够形成弹性模量和冲击强度大、经时变化少的耐冲击性优异的固化物。