Abstract: Piece of equipment for exchanging components in horizontal lathes and a handler, referring to a piece of equipment equipped with one single static storage unit and a piece of automated handling equipment or a robot, which has manipulation means with various retention devices built in, in order to fasten the various components, such as tools, headpieces and accessories, to be moved, exchanged or positioned between two positions, preferably between the storage unit and the main machining spindle or axle of the horizontal lathe, although they may also be moved between the storage unit and a loading point or between the storage unit and an intermediate storage unit.