Heating body

The invention relates to a heating body which is of a flat plate sheet structure and comprises a heating part and conductive parts formed by extending along the two transverse ends of the heating part, the two longitudinal sides of the heating part are each connected with at least one fixing part, and the cross sectional area of each fixing part is larger than the cross sectional area of a heating section in the heating part by at least 10%. According to the heating body, the fixing parts are arranged on the two sides of the heating part in the longitudinal direction respectively, so that when the heating body is assembled into the atomizer, the fixing parts are used for providing enough supporting strength for the heating part, the heating part is not prone to deformation and completely attached to the oil guide body, the heating part is kept flat, and it is guaranteed that the heating part and the oil guide body are not separated. 本发明涉及一种发热体，发热体为平板片状结构，包括发热部以及沿发热部横向两端延伸形成的导电部，发热部在位于纵向的两侧分别连接有至少一个固定部，固定部的横截面