This paper presents details of the studies carried out on flexural behavior of Hollow Core RC Beams with different core depths. As concrete is weak in tension, steel reinforcements are provided in this zone. The concrete is below the neutral axis act as a stress transfer medium between the compression and tension zone. However, in RC beams strength of concrete lying in and near the neutral axis is not fully utilized. So this un-utilized concrete is removed by replacing with any lightweight material. The experimental program consists of casting and testing of RC beams of size 100mm X200mmX2200mm with a hollow core in different diameter of PVC pipes like 12mm, 20mm, 30mm, 50mm from the top near Neutral axis. To study the flexural behavior, all beams are tested by two-point loading. The performance of Hollow Core Beams under flexure by using an analytical method (ANSYS) as well as Experimental method. It shows Ultimate cracking load is more for hollow sections when compared with Solid Beam.