Side with frictional interaction between concrete and steel, shear connector plays crucial role in terms of slip protection ranging up to stress transfer though it. Even if variety of shear connectors are available, headed stud shear connectors are widely used in construction sector. The thesis has scientific goal of studying the behavior of the composite beam through the shear connector made of reinforcement bar. It contained 40 combinations of the parametric and comparative study for composite beams, which depend on the shear connector dimensional variation supported with, the concrete behavior dissimilarity through introduction of fiber effect. The flange length, web height, and location of the shear connector considered as parameters, which later modified with the effect of beam length. The concrete stress-strain behavior, nevertheless, was modified with steel fiber and polyamide fiber to investigate the impact of fibers on composite beam action. The brittle nature of the concrete altered through the delay in its crack with increment of the shear connectors’ flange length and lowering of the shear connector location towards the bottom of structural steel. The result associated to the web height of the shear connector, however, relayed on its location and the beam length. The strain impact had also its own effect on the web height. Since strain is higher at the beam lower, the lateral slip was not huge near the neutral axis. Hence, the improvement on concrete upgraded the strength of the composite beam.