This study examines facility piping that has continued to appear in Le Corbusier''s architecture since the 1920s when the concept of mechanical aesthetics was formed. Unlike Frank Lloyd Wright and Louis l. Kahn, Le Corbusier actively exposes plumbings. Le Corbusier continues to expose plumbings, but focuses on facility pipes that have not been well illuminated. Data are analyzed for literature surveys and case visit data. While analyzing Le Corbusier''s architectural works, I would like to reveal the architectural importance of Le Corbusier''s plumbings as an element of mechanical beauty. In Le Corbusier, a house is a living machine and a building is a work machine, meaning that houses and buildings can operate implicitly like efficient machines, so it is meaningful to know the function and beauty of the pipes and shafts by intentionally exposing, covering, and designing them in Le Corbusier architecture. That is why it is significant to examine the examples of externally exposed installation pipe fireplace connections, radiator pipes, and water pipes in Le Corbusier''s overall construction of the 1920s. It is an experimental case in which plumbings were exposed through several cases, and especially in the housing plan of aisons en série pour artisans, it was intended to be used with structures using a combination of water pipes and columns. In the 1920s and 1930s, the Armée du Salut, Cité de Refuge, Pavillon Suisse, is particularly meaningful as an example of the design in terms of aesthetics as well as functionality. In Unité d''habitation, Marseille, plumbing was inserted into the structure of the Piloti due to the formation of an artificial land. It is significant as an example used with the structure, and it seems that facility pipes are still exposed and displayed in the machine room hall. In Pavillon d''exposition ZHLC, all of the plumbing and shafts exposed inside the building are exposed, and they are applied in color to be meaningful not only as a functional aspect but also as a design element. These attempts demonstrate the continuous exposure of plumbings and shafts to Le Corbusier from the 1920s to the 1960s. The exposure of plumbing is an architectural element to which the concept of exhibition and mechanical beauty can be applied. Therefore, plumbing has important significance as an architectural element that can be applied in modern architecture.