An aroma-diffusing heating device (1) comprising a heating base (10), an aroma capsule (12) and a cap (14). The heating base (10) defines a top accommodation open chamber (100) in which the aroma capsule (12) is detachably accommodated and heated in contact with the periphery of said top accommodation chamber (100) in order to give off a fragrance. The capsule (12) comprises an aromatic substance containing heat-transfer container having a top opening with a rim around which may have a sealing film bonded thereto. The capsule (12) may further comprise a breathing film also bonded to the heat-transfer container. Preferably the aromatic substance used for the source of fragrance is an aromatic wax.
