In 1957, human skin infection by M. canis were firstly reported in Kyungsang province in Korea. Later, in 1960 new cases were also reported in the other province, the Choongchung. However, M. canis infection has been reported only sporadically in Seoul city. This extremely low incidenc in this area may not represent true negative rate but reflect lack of the alertness of .M. canis infection. During the years 1978 and 1979, 15 out-patients were diagnosed as M canis infection of the skin at the Department of Dermatology of Severance Hoapital, Yonsei University. These 15 patients were found to belong to six different families residing in the central Korea and never resided outside of that area, The Kyungki province. Majority of the cases(11/15) were clinically diagnosed as tinea corporis, as Kerion celsi and 4 cases were tinea capitis. Among them, combined infection by tinea capitis and tinea corporis were confirmed in two patients. Although the ages of the pateints were widely distributed from 2 to 36 years, children under age 10 were the major population among thern. Five domestic cats from 5 families were examined and confirmed to be infected by M. cams.