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The wear what occurs between the stator and the rotor has an important role in the working life of progressive cavity pumps (PCP) in design parameters. In addition to the tribological characteristics of the materials of stator-rotor the great importance is the contact pressure between the two elements in relative motion. Initially this contact pressure is closely related to the type of rotor-stator assemblage, but it may also depend on other factors such as: modulus of elasticity, Poisson’s ratio, coefficient o frictions etc. For this reason it is necessary to evaluate with precision enough contact pressure between the stator and rotor. In this paper are presented the results of the numerical analysis based on FEM for contact pressure depending on interference, physic and mechanical characteristics of the material of the stator and rotor.