Background: Rheumatoid arthritis is an autoimmune inflammatory rheumatic disease that causes chronic synovialinflammation eventually leading to joint destruction and disability. The aim of this study was to determine the variationsof hepatic proteins, myeloperoxidase, and iron in rheumatoid arthritis Tunisian patients and their implications ininflammation and in iron metabolism.Methods: Overall, 172 patients from the Rheumatology Department of the University Hospital “Farhat Hached”, Sousse-Tunisia between 2011 and 2012, with rheumatoid arthritis (97.1% women, average age: 48±13 yr) and 147healthy volunteers (70.1% women, average age: 46 ± 7 yr) were included in this study. Serum hepatic proteins (highsensitiveC-reactive protein, ceruloplasmin, albumin, transferrin, α-1-acid glycoprotein and haptoglobin) were assessedby immunoturbidimetry (COBAS INTEGRA 400, Roche) and ferritin was measured by a microparticulateimmunoenzymatic technic (AxSYM, ABBOTT, Germany), Plasma myeloperoxidase was determined by Enzyme-Linked Immunosorbent Assay. Serum iron was measured according to a colorimetric method at 595 nm (CX9-BECKMANN Coulter-Fuller-Ton, CA).Results: Significantly higher levels of high-sensitive C-reactive protein, a-1-acid glycoprotein, Haptoglobin and myeloperoxidasein patients compared to controls (P<10-3). Albumin and iron rates were significantly decreased in patientscompared to healthy group (P=0.026 and P<10-3, respectively). There were no differences between cases andcontrols for levels of ceruloplasmin, transferrin and ferritin (P=0.782, P=0.808, and P=0.175, respectively).Conclusion: The high-sensitive C-reactive protein, α-1-acid glycoprotein, and haptoglobin increased in acute phaseproteins in rheumatoid arthritis disease. The pro-inflammatory cytokines affect iron metabolism leading to the irondeficiency and rheumatoid anemia, which influenced Tf and ferritin levels.