The present invention relates to a polycyclohexylenedimethylene terephthalate resin composition having improved reflectivity, heat resistance, and yellowing resistance. The resin composition according to one embodiment of the present invention includes 40 to 95 wt % of polycyclohexylenedimethylene terephthalate resin; 1 to 50 wt % of a white pigment; and 1 to 50 wt % of a filler, and the amount of germanium (Ge) atoms remaining in the resin is 30 to 1,000 ppm based on the weight of the resin.