The aim of this article is to present coherently the new Sejm’s procedure regarding immunity of President of the Supreme Audit Office. Toward this end, it provides an analysis of the amendments adopted regarding said legal regulations and shows differences in comparison to the procedure regarding Members of Parliament. As a matter of fact, until recently there have been no provisions specifying in detail this particular immunity procedure. Updating of the Supreme Audit Office Act and the Rules of Procedure of the Sejm has fi lled respective gap in the legal system. Both legal acts define in detail subsequent stages of the immunity procedure, beginning from introducing immunity motion to the Speaker of the Sejm, ending with adoption of the resolution by the Sejm on whether to withdraw or to continue immunity.