Provided is a heating device for blocking the flow of air if the inside of a cartridge enters a negative-pressure state upon discontinuing or completing the supply of a transfusion liquid or blood being infused into a human body, the device comprising: a cartridge upper plate which is formed so as to have an inflow port and is formed so as to have a fluid-guide member for guiding the flow of a fluid a cartridge lower plate which is formed so as to have an outflow port and is formed so as to have another fluid-guide member positioned spaced apart from said fluid-guide member a heater which is disposed between the cartridge upper plate and lower plate and heats the fluid being guided by means of the fluid-guide members air filters which are positioned outside the fluid-guide members and are adapted to discharge, into the atmosphere, air bubbles that are generated in the heated fluid and a means which is provided on the cartridge upper and lower plate fluid flow pathways, keeps the flow of fluid normal in the positive-pressure state and blocks the fluid movement pathway if a negative pressure occurs inside the cartridge.Linvention concerne un dispositif de chauffage pour bloquer le flux dair, si lintérieur dune cartouche atteint un état de pression négative à larrêt ou à lissue de lalimentation en liquide de transfusion ou en sang perfusé dun corps humain, le dispositif comportant : une plaque supérieure de cartouche formée de manière à présenter un orifice dentrée et formée de manière à présenter un élément de guidage de liquide afin de guider lécoulement dun liquide une plaque inférieure de cartouche formée de manière à présenter un orifice de sortie et formée de manière à présenter un autre élément de guidage de liquide espacé dudit élément de guidage de liquide un réchauffeur qui est disposé entre la plaque supérieure et la plaque inférieure de la cartouche et chauffe le liquide guidé au moyen des éléments de guidage de liquide des filtres à air positionnés à le
