In a steel-concrete composite beam, the channel shear connector is an easy solution to ensure the connection due to its availability and the simplicity of its welding. However, increasing the channel shear connector length negatively affects the concrete slabs and creates difficulties to cross the longitudinal reinforcing bars. To solve this problem, five new channel shear connector shapes are proposed and studied in this paper. Twelve push-out tests using a new setup, and three pull-out tests, were carried out under monotonic loading to identify the shape that gives the best performance. The failure modes, the effects of new channel shapes on the load-slip behavior, the concrete slaps, the bending deformation, and the height between the two plastic hinges that appeared near the base of channel connectors were mainly studied. The study reveals that the modification of the channel shear connector shape is a promising way and positively influences the concrete-connector relationship and also the bending deformation capacity of the channel connector. As a result, the concrete cracking decreased, the ductility increased between about 15-31%, and the ultimate strength improved slightly between about 0-5.1%. Finally, the experimental results are compared to the existing equations.