Airborne fungal flora of Nagarjunanagar was studied by using vertical cylinders for a period of two years, from 1st January 1982 to 31st December 1983 at 12 m height and for one year (during 1982) at 1 m height. Out of 75 fungal spore types identified, only 10–30 types were observed on more than 200 days in a year.Cladosporium was the dominant type and contributed more than 25% to the total counts. Aspergilli,Alternaria, Periconia andNigrospora were the other major spore types. The total airborne fungal spora showed a distinct seasonal peak in winter at 1 m and at 12 m a summer peak was observed during 1982 in addition to the winter peak. Circadian rhythms were recorded for 18 spore types by using rotorod samplers.