Abstract: A modular system for erecting workbenches and equipped walls, in particular for use in laboratories, comprises a structure constructed of modular uprights and crosspieces to which beams can be fixed which permit supports for pieces of furniture, working tables, etc . . . , to be fitted in a slidable manner.Mounted to the wall are also panels including electrical connections, panels for fluid supply, etc . . . , which have all of the components entirely received inside the associated wall in a flush-relationship therewith.