A shear connector defines as a metal component through which two dissimilar materials or structures can act as a single entity. Hot-rolled steel I-section beams and concrete slabs are joined monolithically in steel-concrete composite beams by a shear connector. Stud is a conventional type of shear connector typically used in steel-concrete composite construction due to its several benefits. Cost and sustainability are two major essential factors for construction. Cost of manufacturing and installation are the major drawbacks for the stud connector. This paper comes with a solution of introducing an innovative shear connector called a T-shape reinforcement connector as a replacement for conventional stud. In the recent era, high strength steel is gaining popularity due to its strength to weight ratio. The finite element models are initially validated by comparing the results with the experiment reported in the literature. A total of twelve steel-concrete composite beams connected with an innovative shear connector made-up of reinforcement are studied numerically in this paper using finite element commercial package ANSYS15 under the positive moment. The degree of shear cconnection, strength of steel beam, height and diameter of reinforcement are considered primary parameters for this present study to understand the behaviour of reinforcement shear connectors on the steel-concrete composite structure. Load bearing capacity, deformation characteristics, end-slip behaviour, ductility factor and failure modes are presented.