The present paper considers some problems related to rubella in the city of São Paulo, S.P., Brazil. The cases reported over the period of 1951 to 1966 (287) are presented and analysed. Seasonal distribution shows a higher incidence during September and October, that is, during Spring, agreeing with what has been observed in other countries. The increase in incidence in 1955 and 1962 seems to suggest that 7 year cycles present themselves here too, although there was also an increase in 1966. Epidemiologic surveys based on serum examination are recomended so that a better knowledge of the distribution of rubella may be achieved in our city.