Aims and Objective: The purpose of this study was to evaluate early tensile and shear bond strength of three dentin bonding agents in combination with a common composite restorative resin to human dentin as well as determination of polymerization contraction gap in shallow dentin cavity where bonding interface is loaded by polymerization contraction stress of restorative resin 1. Materials and Methods: The bond strength was measured on the buccal surface of non-carious freshly extracted human first molar using Z100 composite (3M) mediated by bonding agents and cured with the help of visible light cure unit. Bonding agents which was easily available in the local market were chosen. Tensile and shear bond strength were measured by Universal Testing Machine. Restorative margin was inspected in a microscope (×1000). The maximum width of a possible gap was measured in an ocular screw micrometer. Statistical Analysis Used: Analysis of variance test was used (ANOVA). Results and Conclusion: Of the three bonding agents used (Gluma Comfort Bond, Prim & Bond NT, and Single Bond) Single bond shows maximum shear bond strength and minimum contraction gap. In spite of the high coefficient of correlation found between the of marginal gaps and early shear bond strength, the prediction of shear strength from gap dimension measured and vice versa was not sufficiently relevant.