In this article the perception of economic collaboration by Belgian population after the Second World War and its consequences for the policy of the prosecution service are examined. There was no general dissatisfaction on the way Belgian entrepreneurs behaved during the war. Only those who worked exclusively for the needs of the German army or mistreated the workers were attacked. Another target of public discontent were small entrepreneurs as grocers or innkeepers who were accused of black market activities. This attitude can be explained by the fact that workers feared deportation to Germany and therefore accepted that industry was kept in activity. This was in line with the policy of the main holding companies. As a consequence, the prosecution service found not much support for its ambitious policy that was also directed against big firms. On the other hand, the reactions of the population made clear that public opinion would not accept that economic collaboration in general remained without punishment. Therefore a prompt trial and severe sanctions against entrepreneurs who had done business with the enemy were a priority for the Chief Military Prosecutor Ganshof van der Meersch. ; Cet article analyse la perception de la collaboration économique dans la population belge après la Deuxième Guerre mondiale et ses conséquences sur la politique du ministère public. Il n'existait pas de mécontentement général au sujet de la conduite des entrepreneurs belges durant la guerre. Seuls furent pris à partie ceux qui travaillaient exclusivement au service de l'armée allemande, ou qui maltraitaient les travailleurs, ou encore de petits entrepreneurs, épiciers, cafetiers, soupçonnés de marché noir. Cette attitude consistant à accepter la poursuite de l'activité industrielle s'explique par la crainte des ouvriers d'être déportés en Allemagne et était du reste conforme à la politique des holdings. Il en résulta que le ministère public ne trouva pas beaucoup de soutien à son ambitieuse politique qui visait également les ...