The present investigation deals with the influence of hybrid materials of specially orthotropic nature in free vibration analysis of a thick four-layered Fiber Reinforced Plastic skew laminated composite plate with a circular cutout. Three dimensional finite element models which use the elasticity theory for the determination of stiffness matrices are modeled in ANSYS software to evaluate first five natural frequencies of the laminate. The effect of various hybrid arrangements on the first five natural frequencies of the plate is discussed.