This thesis on Geography-environment deals with "the integration of coffee cultivation in the production structure of Guinée Forestière". Coffee was introduced in the peasant production system by colonial powers between 1902 and 1920, coffee cultivation evolved under the influenced of various socio-economical and demographical situations. Its spatial evolution is a paradox. The perennial area with coffee increases at the detriment of food staffs like rice meanwhile, coffee yards and profits are generally low. Nevertheless densification to other perennial or food crops is rare. However there exist other profitable products like refined palm oil and rubber. Land resources are getting smaller as a result of high regional population growth (4.3% per year while it is 3,1% for the rest of the country). The population mainly depends on extensive agriculture. Land insecurity increases through complex conflicts because the implementation of the modern land code in rural areas is low although it was promulgated in 1992. Thus, farmers favour mixed cropping on slopes associated with coffee in order to maximize their income. For the youths, this choice is a part of their independent process. This thesis shows that the need of land security is more decisive for choosing coffee growing, than its economic profitability.