Recently the frequency of Microsporum canis, as a causative dermatophyte of tinea capitis, is increasing in our country. We herein report a case of tinea capitis caused by Microsporum canis in an eight-day-old infant. Infection was contracted, presumably, from a kitten who had tinea corporis caused by the same species of Microsporum and who lived in the patients house. It is extremely rare for tinea capitis to occur in the neonatal period. Although only one case had been reported in the foreign literature, to our knonwledge, a case has never been reported in Korea. We believe that this patient is the youngest patient with Miicrosporum canis infection of the scalp yet reported, and it is also of interest that he has atypical lesions with black-dot-like non-inflammatory alopecic patches on the scalp.