The article is devoted to the problem of processing personal data by advocates. Much of the discussion is devoted to establishing the status of a advocate in the light of the Personal Data Protection Act of 29 August 1997. The author tries to distinguish when the advocate acts as a controller of personal data and when as their processor to whom that task has been assigned by the controller according to Art. 31 of the above mentioned act. The criteria for making data processing legitimate as well as the duties of an advocate connected with such data processing are also discussed. The author also stresses the consequences of the obligation to keep professional secrets from the point of view of the Personal Data Protection Act and from the poi...