International audience Daily mobility of underprivileged urban dwellers. Evidence from Ouagadougou Urban daily mobility brings about many problems for a large section of the population in Sub-Saharan African cities (high costs, long foot trips...). To study the consequences of lack of means on daily travel behaviour, we use data obtained from a household survey in Ouagadougou, where the lack of public transport is compensated by the use of two-wheelers. The analysis shows a wide spectrum of mobility requirements and practices amongst groups of underprivileged city-dwellers, according to social role and position within the household. Due to their high operating costs, private motorised vehicles are reserved to present-day or future bread winners of the households. Thus, a large part of the population is left behind due to this segregation. Nevertheless, they have considerable transport needs.