Tinissa leguminella is a moth of the Tineidae family. It is found in Yunnan, China. The wingspan is 16.5–19 mm for males. The forewings have a brown ground color, shining dark purplish, scattered with conspicuous white spots throughout, regularly arranged along margins as well as between veins. The hindwings are pale grayish brown, shining dark purplish, with small pale dots apically.