Objective. Cardiovascular disease (CVD) is considered to be the main cause of morbidity and mortality in rheumatoid arthritis (RA) patients. Tumor necrosis factor alpha (TNF), an important pro-inflammatory cytokine, has a multivalent role in the pathogenesis of RA. It is also responsible for the glucose metabolism related alterations and for the increased levels of serum lipids found in these patients. We aimed to evaluate the effects of TNF inhibitors on lipid and glucose metabolism in patients with active RA. Methods. We performed a prospective study in 117 consecutive patients with active RA undergoing periodic treatment with TNF inhibitors-Adalimumab (ADA), Etanercept (ETA), Infliximab (IFX)-, combined with conventional synthetic disease modifying antirheumatic drugs (csDMARDs), according to the national recommendations for the treatment of RA. At the time of the enrollment, all patients were assessed according to a predefined protocol including demographics and RA-related parameters (inflammatory syndrome, disease activity, medication) as well as metabolic biomarkers such as total cholesterol (TC), HDL cholesterol (HDL-C), LDL cholesterol (LDL-C), triglycerides (TG) and serum glucose level. Statistical analysis was performed in STATA 12/SE software, p<0.05. Results. We demonstrated a significant decrease in TC, TG and fasting glucose levels, particularly in patients treated with ADA and ETA (p<0.05). Moreover, we noticed a significant correlation between the mean levels of lipid and glucose and inflammatory parameters (ESR and CRP), but not with DAS28-CRP. The same strong correlation was demonstrated between the decrease of TC and TG values (∆TC and ∆TG, respectively) and the decrease of CRP and ESR values (∆CRP and ∆ESR, respectively), that is not maintained with DAS28-CRP score. Conclusions. TNF inhibitors, particularly ADA and ETA are able to decrease serum levels of both lipid and glucose metabolism in patients with active RA in long-term administration, indirectly modulating the cardio-vascular risk.