The coffee machine (1) comprises a modular frame comprising a primary module (2) and structurally independent secondary modules (3, 4) rigidly connected with the primary module (2), primary components assembled in the primary module (2), and an aesthetic casing (5) for covering the modular frame, the secondary modules (3, 4) comprising at least one base secondary module (3) and at least one lateral secondary module (4), respectively, cooperating with the primary module (2) to define the height and the overall width, respectively, of the coffee machine (1).