Steel–concrete composite beams are widely used in building and bridge engineering due to their favorable structural performance, ease of development, and low cost. These beams offer several advantages, including a higher span-to-depth ratio and less deflection. This paper presents an experimental investigation of a composite beam that is connected with T-shaped shear connectors at varying spacings of 200 and 250 mm. To study the partial interaction behavior of the composite beam, specimens were made with different numbers of shear connectors and spacing, and were casted and subjected to two-point loading. The bending behavior of the composite beam was analyzed, and the results showed that the composite beam with 250 mm spacing had the highest load-carrying capacity compared to other beams. As the number of shear connectors decreased, the composite beam became more flexible, with the composite beam with 200 mm spacing failing at a lower load. Additionally, there was a slight increase in the load-carrying capacity of the composite beam as the grade of concrete increased.