Bucculatrix univoca is a moth in the family Bucculatricidae. It was described by Edward Meyrick in 1918. It is found in Japan (Kyushu, Ryukyu), Taiwan and India.
The wingspan is 5-6.5 mm.
The larvae feed on Ipomoea aquatica (syn. I. reptans); Ipomoea indica (syn. I. congesta); and Ipomoea batatas. They mine the leaves of their host plant.