In an adjusting device for a charger device, in particular an exhaust gas turbocharger, with a holding ring on which a plurality of guide vanes is mounted in an operative connection with an actuating ring via a respective connecting element and whose respective angle of attack is adjustable by rotation of the actuating ring, the respective connecting elements are in an operative connection with the actuating element via at least one effective area which extends slant to the axial direction of the adjusting device so as to bias the connecting elements and the guide vanes associated therewith in a predetermined axial direction.