The clinical relevance of mycotic infections of the skin and mucous membranes is often underestimated, although their number and duration are far greater than for all other microbial infections, and a rising incidence can be observed in childhood. An overview of important mycotic infections and their dermatologic manifestations is given here, with special emphasis on dermatophytoses and candidoses because mould infections only rarely lead to cutaneous lesions, even in immunocompromised children.