Belgian Parliament consists of House Representatives and Senate and the status of its members is similar to status of MP’s in most European countries. Some differences worth noting derive of organization of Belgian state, which is a federal country with strong national and ethnic elements. The mandate of MP’s is a free mandate. The members of both houses represent the whole Belgian Nation are not bound by any instructions coming from their electors. The most characteristic of status of Belgian MP’s is their appurtenance to language groups what influences their way of realizing the mandate. Apart of language issues, status of Belgian MP’s can be also characterized by material conditions of executing the mandate and scope of immunities, both material and formal ones.