According to the present invention, it is possible to provide a urethane resin used for a material having excellent substrate adhesion, coating film physical properties (scratch resistance), and a high refractive index. The urethane resin of the present invention is a reaction product of a hydroxyl group-containing (meth) acrylate (A1) and a polyvalent isocyanate (A2). The urethane resin does not have a tricyclic or more aromatic polycyclic structure. The hydroxyl group-containing (meth) acrylate (A1) has at least one aromatic ring structure in a molecule, and the aromatic ring structure is an aromatic monocyclic structure or an aromatic bicyclic structure. None

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