Is the so-often-confirmed singularity of the French legislative procedure a myth or a reality? Does the French Government possess the strongest possible armour in order to assure its domination over the legislative procedure and does it use it in an abusive manner? A comparative study of the different steps of elaboration of the law in German, British, French and Italian parliamentary regimes informs us that the theory on the abnormality of the French rationalised parliamentarism must be reversed. All of these Governments possess equivalent procedural means in order for them to have their bills adopted. The accumulation of the majority rule and the implementation of rationalised parliamentarism should not be analysed, as such, as a singularity in the way of exercise of governmental power. Institutional culture constitutes a parameter that must be taken into account, together with the degree of rigidity of the majority and of rationalised parliamentarism, in order for the advantages a Government has in order for it to achieve its legislative programme to be determined.