The research was conducted in Kisangani, capital of the Eastern Province (DRC) dismembered. The objective was to analyze the contribution of traffic of diamond on the socio-economic conditions of the actors in Kisangani on the one hand, and on the other hand, the axes of allocation of the income. The investigation was conducted using a semi-structured interview guide. Investigations showed that if the turnover of the actor was low before their entry into the circuit of the diamond market, some said revenue increase were found with the dividends derived from this activity. This money enabled them to acquire property and continuity of traffic. The nature of these goods has significantly evolved compared to the starting situation. Their income is also assigned for other purposes including both expenditures to meet the needs of the members of the family, friends and acquaintances and workers. Diamond activity helped increase their financial capacity and enabled them to acquire property coveted by the population and the other economic operators in the city.