A parking brake device for pneumatically operated drum or disc brakes and an associated control method involve the use of an electromechanically driven clamping device that acts upon the cylinder plunger (3) of a brake cylinder. Said clamping device encircles the cylinder plunger (3) and is designed for holding the cylinder plunger (3) during braking operations for parking by means of clamping forces or by a form fit.
