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Objective: In recent years; vitamin D, being a steroid hormone with neuroprotective and anti-oxidant effects apart from the effects on musculoskeletal system and endocrine system has been emphasized and studies on the relation of metabolic diseases, malignancies, neuropsychiatric diseases with vitamin D has been performed. A pandemic deficiency of vitamin D is mentioned all around the world. Although it has been reported that there is a relation between tobacco consumption and vitamin D; literature is limited and no data from Turkey regarding to the tobacco consumption and vitamin D has been reported. To evaluate vitamin D levels in individuals admitted to our hospitals smoking cessation unit and accordingly, to investigate the relation of vitamin D levels with tobacco dependence. Methods: Seventy-two cases between ages of 17-69 referring to smoking cessation unit were included in our study. Retrospectively, demographic data form the patients files, Fagerstrom Test for Nicotine Dependence (FTND), Beck Anxiety Inventory (BAI), Beck Depression Inventory (BDI) forms were examined and levels of vitamin D were recorded. Whether the parameters conform the normal distribution or not is evaluated by Kolmogorov-Smirnov test. In statistical analyses; Mann-Whitney U test, Kruskall-Wallis H test, one way ANOVA were applied. p [Anadolu Psikiyatri Derg 2016; 17(3.000): 196-202]