The present disclosure provides a manganese-doped InZnP quantum dot having high reproducibility and exhibiting superior optical efficiency, and a method of manufacturing the quantum dot. According to an aspect of an exemplary embodiment, the manganese-doped InZnP quantum dot is of manufactured by synthesizing an InZnP quantum dot by reacting indium acetate, zinc acetate, and tris(trimethylsilyl)phosphine; and then doping the InZnP quantum dot with manganese.