Abstract: The present invention relates to an entrance door to premises. The entrance door (1) according to the invention is provided to have one of its faces (15) turned toward the inside of said premises, where the temperature deviations are limited over time, and its other face (38) turned toward the outside of these premises, where the temperature deviations are more important, said door being equipped with a guide (6) to guide it into displacement relative to a wall frame (5) on which is it mounted, and (3) to close it on said wall frame (5). Said door (1) is made up of two panels (9 and 10) that are connected together in superposition and in a zone of their faces that face each other (20 and 37a), said guides (3 and 6) being mounted on the panel (9) and meant to have its external face (15) turned toward the inside of said premises.