<p>Disclosed is a resin composition wherein birefringence is controlled. Specifically disclosed is a resin composition essentially containing a resin (A) containing a glutarimide unit and an acrylate unit, and another resin (B) containing a glutarimide unit, an acrylate unit and an aromatic vinyl unit. This resin composition can be easily produced at low cost, and is excellent in transparency and heat resistance. In particular, orientational birefringence can be easily controlled in this resin composition. This resin composition can be used for molded bodies for optical applications which require transparency and heat resistance.</p>
