In the years 1984-1988 in the Department of Dermatology, M. A. in Gdańsk 80 cases of microsporum mycoses were diagnosed. The cases were due to Microsporum canis. Among 80 cases of this mycosis we found 59 children aged from 2 to 15 years and 21 subjects aged over 15 years. In children the most cases were diagnosed in the age group 4-7 years. In 40 cases (50%). M. canis produced lesions of hairless skin and in 36 cases (45%) the scalp was involved.