Rheumatoid arthritis (RA) is the most common auto-immune disease. Rarely described in Niger, we reported its epidemiological, clinical, paraclinical, therapeutic, and evolutionary aspects in hospitals environments. In order to analyze these aspects in detail, a prospective study has been realized over a period of one (1) year in the Rheumatology Department of the Regional Hospital Center of Maradi. We have included all RA cases in accordance with the ACR/EULAR classification criteria of 2010. The data was entered and analyzed on SPSS 20.0 software. After collecting and studying 32 AR observations from among 846 rheumatologic consultations, the results have demonstrated different points: the average patient's age is 38,9 years, the delay for the diagnosis was 6 years, and in some cases extraarticular manifestations have been observed. The results show that the inflammatory syndrome was constant and that the treatment remains classic with non-pharmacologic means, analgesics, NSAID (non-steroidal antiinflammatory agent), infiltrations and DMARDs (disease-modifying anti-rheumatic drug). The evolution is positive in all the cases. Thanks to this study it is possible to affirm that rheumatoid arthritis is a reality in Niger and it has been better described. The diagnosis is late, the articular and systemic manifestations are the same as in Caucasians, but the autoimmunity seems less. The disease is very active, altering the quality of life. As for its treatment, conventional background therapy still remains effective.