In order to know the epidemiological profile of the cancerous disease in Algeria, from the end of the 1980s, cancer registries were set up in different regions of the country, which made it possible to know the prevalent neoplastic localizations as well. in the male and female sex and especially to engage in a number of actions in the fight against cancer such as cervical and breast cancer screening campaigns, erection of new cancer centers, medical training in oncology as well as reinforcement of the park in radiotherapy machines. These cancer registries, which until now have only been descriptive epidemiology, should in the future evaluate the results of these actions (evaluative epidemiology) and launch studies on causal epidemiology.