Provided is a curable resin composition which can be molded by casting to obtain composite materials each composed of a polycarbonate resin and an acrylic resin and having high transparency and high impact strength. More specifically, provided is a curing resin composition comprising an acrylic monomer having a saturated group, a polycarbonate resin having an unsaturated-group-containing terminal structure at a molecular end, and a free-radical polymerization initiator.

A thermoplastic resin includes a constituent unit (A) derived from a monomer represented by the following general formula (1) and a constituent unit (C) derived from a monomer represented by the following general formula (3):

##STR00001##

A curable resin composition contains a polycarbonate resin and a styrenic monomer, the polycarbonate resin comprising a terminal structure that has an unsaturated group represented by the following Formula (1): ##STR00001## and a constitutional unit represented by the following Formula (2): ##STR00002##

Provided is a thermoplastic resin composition with excellent optical properties, having high fluidity and good moldability without compromising properties of optical resin compositions, and having a compositional makeup that can prevent gelatinization (increase in molecular weight). The present invention provides a polycarbonate resin including: a constituent unit (A) derived from a diol represented by the formula (1) below; and a constituent unit (B) represented by the formula (2) below and/or a constituent unit (C) represented by the formula (3) below:

##STR00001##