Epidemiological surveillance of malaria cases reported in Geneva between 1998 and 2004 is analysed and compared to a similar retrospective study conducted in 1988-1994. A total of 426 cases have been reported, with a mean of 61 cases per year and an increase of 29,4% compared to the initial study. Most of the increase was seen in patients of African origin, from 115 to 170 cases, of whom 56% visited friends and relatives. Malaria was acquired predominantly in sub-Saharan Africa (88,5%), mainly West and Central Africa. P. falciparum was the predominant species (75,3%), with significant seasonality during the summer and in January. This was not the case for other species. Two third of cases did not take any chemoprophylaxis. These results stress the importance of the disease and the need for adequate protection of travellers.