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Introduction: In recent years, the role of the mammalian target of rapamycin (mTOR) pathway, which is one of the intracellular signaling pathways and known as the main control pathway of metabolism, in the pathogenesis of psoriasis has been emphasized. Objectives: We sought to investigate the importance of the mTOR pathway in the pathogenesis of psoriasis. Methods: Forty patients with psoriasis and 40 healthy volunteers were included in this case-control study. Serum fasting mTORC1 and mTORC2 levels of the study groups were examined by enzyme-linked immunosorbent assay. Results: Serum mTORC1 and mTORC2 levels were significantly lower in patients with psoriasis than controls (p= 0.001). A positive correlation was found between serum mTORC1 and serum mTORC2 levels in patients with psoriasis (p=0,001, r=0,826). Conclusion: The lower serum levels of mTORC1 and mTORC2 complexes which are active signalling molecules in the cell, were found to be lower in patient with psoriasis, suggesting that it may be an indicator of increased intracellular activation of these molecules. Our opinion that agents that can effectively inhibit both mTOR complexes may be more effective in the treatment of psoriasis.