The invention relates to a heating device (2, 200) for a smoke-free cigarette, said device substantially consisting of a liquid container (21, 24, 28, 130, 220) and / or a reaction element (22, 23, 25, 210, 230), separated from one another by a destructible seal (26, 64, 65, 212, 223) and filled with substances, the mixing of which triggers an exothermic reaction. The invention also relates to the use of a heating device (2, 200) in a smoke-free cigarette and to a smoke-free cigarette comprising a heating device (2, 200).