Parapoynx fluctuosalis is a moth of the Crambidae family. It is a widespread species, known from Africa, India, Sri Lanka, China, Japan, Malaysia, Taiwan, Guam, Hawaii, Fiji, Australia and the Galapagos Islands. It is also an introduced species in Europe, where it has been recorded from Great Britain, the Iberian Peninsula and Sardinia. Adults are sexually dimorphic, with a variable colouration of the wings.