Abstract: An optical measuring machine for measuring an object having a mainly longitudinal extension includes a holding assembly for the object, a sensing optical assembly movable parallel to a longitudinal axis of the object in order to allow complete acquisition of an image representing it, a contact probe connected to the optical assembly to move together with it along said longitudinal axis and movable with respect to the optical assembly orthogonally to the longitudinal axis, and sensor means configured to detect at least one angular position about the longitudinal axis of the holding assembly, an axial position along the longitudinal axis of the optical assembly and a radial position, orthogonal to the longitudinal axis, of the contact probe.