This paper aims to study the behavior of RC beams with openings in shear zone. The behavior of beam with large opening and small opening was investigated. Experimental and numerical investigations are performed on specified specimens with many varying parameters. The experimental program consists of six reinforced concrete beams with dimension as (200 mm in width, 400 mm in depth and 2400 mm in length). The clear span between supports is equal to 2100 mm. The tests specimens were divided into 3 groups: the first group includes one solid RC beam without openings, the second group includes four beams with large opening and the third group includes one beam with small opening. The testing results include: the crack patterns, mode of failures, load-deflection curves, loadstrain curves for the inclined bars and the stirrups and the value of the failure load. The experimental results showed that there was a significant improvement in the shear zone by using reinforcement around opening for beams with large and small openings. In addition, the tested beams specimens are analyzed using the nonlinear finite element program, ANSYS. The experimental results showed that the effect of adding reinforcement bars around the opening substantially improve the beam shear strength.