The widespread demand for, and use of dental adhesives has fueled an intense development of better and easier dental adhesives in rapid succession and dentists have literally been inundated with successive “generations” of adhesive materials. The “generational” definitions help in identification of chemistries involved, the strength of dentinal bond and the ease of use for the practitioner.The clinical use of resin composites has expanded considerably over the past few years due to increased esthetic demands by patients, new improved formulations and simplification of bonding procedures. Evaluation of bond strength provides a screening mechanism use of adhesives and an indication of the potential for their clinical success.the purpose of this study was to find and compare the shear bond strength of three different generation of adhesive systems fifth, sixth and seventh to dentin of human molars using same composite.