Histologically proven deep seated mycosis were found in 33 cases (2.05%) out of 1613 autopsied aged patients more than 60 years old at Tokyo Metropolitan Geriatric Hospital from 1977 through 1983. Seven patients were involved systemically and 26 patients were localized (the lung in 18 patients, the urinary tract in 3 patients, the gastrointestinal tract in 4 patients and the CNS in one patient). Identified organisms were Aspergillus in 15 patients, Cryptococcus in 8 patients, Candida in 7 patients and unidentified in 4. In one patient Aspergillus and Candida were identified concomitantly. Underlying diseases were solid tumor in 11, hematological diseases in six and corticosteroid therapy in one. The other 16 pateints had no definite immunosuppresive condition other than bed ridden state for more than three months. No significant difference was found in underlying diseases, duration of illness or laboratory data between the systemic and other localized types of deep seated mycosis.