A kind of heat generating device, including an ontology, a connection piece and a heat-generating units. Ontology includes an overcoating portion and a Hou cover, and overcoating portion and the edge of Hou cover have defined an opening jointly, and a receiving room is defined in overcoating portion and the encirclement of Hou cover, and receiving room is extraneous through open communication what. Connector sets what open edge. Heat-generating units include a fever ontology and a connecting interface, and fever ontology sets what and is cladded with inside portion, and connecting interface is electrically connected what fever ontology. It uses and the heat generating device of the compound sexual function with warm packet and storage pocket is provided.一種發熱裝置,包括一本體、一連接件以及一發熱單元。本體包括一外覆部以及一後蓋部,外覆部與後蓋部的邊緣共同界定有一開口,外覆部與後蓋部包圍界定一收納室,收納室經開口連通於外界。連接件設於開口邊緣。發熱單元包括一發熱本體及一連接介面,發熱本體設於外覆部內部,連接介面電性連接於發熱本體。藉以提供具有暖暖包以及收納袋之複合性功能的發熱裝置。