A cardan shaft is a rotating shaft that transmits power from the engine to the differential gear of a rear-wheel-drive vehicles cardan shaft must operate through constantly changing angles between the transmission and axle. Because of the continuous rotation, high vibration is occurred on it. Due this problem shaft tends to bend or deform .Major problem in cardan shaft is vibration. The design created in Creo parametric software and analysis using Ansys software. To check the natural frequency based on modal analysis in Ansys software. Finally, it’s compared to the various shaft cut-out geometry.