Several tendencies in the process of political decision-making in Belgium tend to put under strain the official model of representative democracy. One of these evolutions is the set up of many advisory councils, and especially the dynamism of some of these advisory councils to move up to participation in the decision-making itself. The process starts at the functional basis of the advisory councils: an information function, an advice function, a function to make proposals, an investigation function and a selection function. It is possible to get to the care of the decision for reason of a liability to advice, the quality as regards content of the advice, the composition of the councils and the appeal to the public opinion. The dysfunctions are the obstacles that need to be advoided: the alibi function, a basis for non-decision, the delay and concealing of the decision-making itself, a certain obliqueness in the composition and the undermining of the representative function of parliament.