This invention concerns an extractable carriage for kitchen units made from modular components coupled together in a simple and rapid fashion and going to make up carriages which may differ in width while their height and length remain unaltered. The extractable carriage according to the invention is characterized by the fact that it is composed of two tracks with no transversal connection; likewise, the two U-shaped lateral supporting frames are separate items in that there is no connection between their uprights until assembly, and then only by means of the trays that are directly attached to them.