Abstract: The invention relates to a system for the mechanical and electrical connection of printed circuit modules. According to the invention, the corresponding module is produced with a series of tongues (1) which are distributed uniformly around the edge thereof and which comprise two symmetrical sections (1a and 1b). Moreover, the configuration of the tongues (1) is identical and symmetrical to the space defined therebetween, such as to enable the corresponding intercoupling of modules. In this way, the modules (7) are connected mechanically and electrically by means of the contact formed by the lateral metallized surface of the tongues and both the upper and lower surfaces of the modules. Asymmetric tongues (2) are disposed at the corners, comprising a single section which is positioned perpendicularly to one of the sections of the adjacent, symmetrical tongue (1).