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Introduction: Dental implants are used to replace missing teeth. Smoking tobacco is considered as risk factor in implant success rate. Materials and method: In present study 50 patients were divided into equal two groups: Group I with smokers and Group II with nonsmokers. After considering the inclusion and exclusion criteria, implant was placed by slandered aseptic procedure in both the groups. The success of implant was assessed clinically for mobility f implant and radiographically for marginal bone loss at 3, 6 and 9 months after implant placement. The difference in the parameters at each recall interval was examined and recorded. The obtained data for both the groups were statistically analyzed. Results: There was marginal loss around dental implant and implant mobility was observed in smoker at 3,6 and 9 months. The finding was statistically significant in group I. Conclusion: There is definite correlation of smoking on failure of dental implants.