As a latest biometric technique, finger vein recognition has been proved to be one of the most reliable biometric technology for personal authentication and security. The uncertainties and ambiguity in finger vein extraction can be handled more efficiently using fuzzy theory based techniques. Mamdani based fuzzy inference system is presented in this paper for locating the vein patterns in a finger vein image. A comparative analysis of the results is performed with some of the standard techniques. © 2017 IEEE.