Process for the preparation of a superhydrophobic film comprising the steps of applying a hydrophobic polymer in the liquid phase on a surface so as to form a layer of hydrophobic polymer, applying on said layer of hydrophobic polymer a membrane having a porosity of between 105 and 6×108 pores/cm2 in which the pores have a diameter smaller than or equal to 3 μm, subjecting said layer of hydrophobic polymer to a thermal treatment so as to form a superhydrophobic film, and removing said membrane.