Sicyopterus erythropterus is a species of goby in the family Oxudercidae, or alternatively, Gobiidae. It is only known from the waters of the Tirawiwa River, which is a major tributary of the Wapoga River, which in turn flows into the eastern edge of Cenderawasih Bay in Papua New Guinea.
Sicyopterus erythropterus can reach a standard length of .