Objective: This study was to investigate and compare in-vitro shear bond strength of self- adhesive flowable composite and traditional adhesively bonded flowable composite.   Materials and methods: A total of 40 caries free extracted human premolars were collected for this test. They were divided into two groups, enamel group and dentin group with 20 teeth each. Teeth were placed in acrylic molds then enamel and dentin were flattened by silicon paper under coolant. Then each group was sub grouped into two sub groups, 10 teeth each according to the type of applied composite. Adhesives were applied and resin composite cylinders were prepared with Teflon tubes. The samples were tested for shear bond strength with a universal testing machine and stress at failure was calculated.   Results: self-adhesive flowable composite showed lower shear bond strength values with mean (15±2.13) for enamel and (16.38±2.44) for dentin than regular flowable composite with mean (20±4.6) for enamel and (22.63±3.1) for dentin.   Conclusion: The mean shear bond strength of regular flowable composite and self-adhesive flowable composite values was higher with dentin than with enamel.