Abstract: An improved guillotine-type door for a fireplace enclosure. An improved guillotine-type door, characterized by the fact that it opens by rotating around a lower pivoting axis (15), the ends of which are lower fingers (13) for guidance along vertical glides, the said lower fingers receiving the end attachment of the movable connection to the auxiliary mechanical device (31) for maneuvering, and being immobilized in the bottom lower position by a holding device (22), and by the fact that each vertical glide has a device for lateral disengagement at the level of each upper finger (14), for the purpose of allowing the door to be inclined, then pivoted around the lower axis (15). This invention is of interest for manufacturers of fireplace enclosures.