Abstract: This invention concerns an automatic feed device for a solid-fuel boiler, specifically for logs of wood. The subject of the invention is an automatic feed device for a solid-fuel boiler, specifically for logs of wood, characterized by the fact that it comprises: a loader (6, 6') having means (19, 66) for receiving a load of fuel (2) to be introduced into the boiler (1) and movable between a loading point for the said load and a point of dumping at the interior of the firebox of the boiler, means (24, 26) for moving the loader, means (29, 30) for controlling the opening of the door (4) of the boiler, means (36, 37) for controlling the dumping of the fuel (2) into the firebox at the end of the course of the loader, and means (44, 58) for detecting the state of combustion at the front of the grate (3) of the boiler, and for controlling the means for moving the loader.