Modular structure (1; 1') comprising: - a plurality of modules each having opposite front and rear faces, each module comprising an inner housing and at least two lateral openings capable of allowing the inner housing to communicate with an outside of the inner housing, - a plurality of connectors each capable of connecting two modules placed adjacently with respective lateral openings facing one another, each connector including a connector body having a globally parallelepiped shape, extending along an extension direction and having opposite front and rear faces, the connector body of each connector comprising two fitting parts (31a, 31b) capable of being respectively received in the inner housings of the two adjacent modules while extending through the respective lateral openings of the two adjacent modules, wherein the connector body of each connector is identical to the connector body of the other connectors, wherein each module comprises at least one base element (5; 5') comprising a base body identical to the base body of the base elements (5; 5') of the other modules, and a facade element selected from a range of facade elements respectively having different functionalities, the base element (5; 5') having a rear face belonging to the rear face of the module, a front face opposite to the rear face, and a peripheral edge between the front and rear faces, the facade element having a front face belonging to the front face of the module, and a rear face opposite to the front face, the base element (5; 5') and the facade element of each module being capable of being mounted removably on one another in such a way that the facade element covers at least a portion of the front face of the base element (5; 5'), the inner housing and the lateral openings being situated between the base element (5; 5') and the facade element, characterized in that the connector body of each connector comprises a central portion, the fitting parts (31a, 31b) extending from either sides of the central portion along the extension direction, the central portion being configured to be positioned between the two adjacent modules when the fitting parts (31a, 31b) are received in the inner housings of said two adjacent modules, the central portion being offset with respect to the two fitting parts (31a, 31b) in a direction, normal to the front and rear faces so as to present two opposite stop surfaces extending transversely with respect to the extension direction on the rear face of the connector, the opposite stop surfaces being in abutment respectively the peripheral edges of the two adjacent modules when the fitting parts (31a, 31b) are received in the inner housings of said two adjacent modules, and in that the base body of each module comprises positioning and holding elements, the fitting parts (31a, 31b) of each connector comprising positioning and holding elements complementary to the positioning and holding elements of the base body. - a plurality of modules each having opposite front and rear faces, each module comprising an inner housing and at least two lateral openings capable of allowing the inner housing to communicate with an outside of the inner housing, - a plurality of connectors each capable of connecting two modules placed adjacently with respective lateral openings facing one another, each connector including a connector body having a globally parallelepiped shape, extending along an extension direction and having opposite front and rear faces, the connector body of each connector comprising two fitting parts (31a, 31b) capable of being respectively received in the inner housings of the two adjacent modules while extending through the respective lateral openings of the two adjacent modules,