This paper shows the abundance, density and phenology of Sergentomyia minuta in Aragon (Northeast of Spain). Specimens were collected using sticky traps and sampling was carried out taking vegetation as ecologycal indicator. Differences in density were found among the studied areas related to ecologycal conditions. S. minuta showed its highest density in the coldest and rainiest area of Aragon (Central Pyrenees). These results are discussed with those got from other authors in different parts of the Mediterranean Basin.