The invention relates to a heating device (6) for a tank (2) of an exhaust gas aftertreatment agent system, having a carrier (7) and having a plurality of heating elements (10) arranged on the carrier (7). According to the invention, the carrier (7) has a plurality of carrying elements (8), which are connected to one another in an articulated manner, and at least one spring element (13), which applies a spring force to at least two of the carrying elements (8). The carrier (7) is thus formed to be flexible or deformable overall, wherein the carrier is forced into a final shape by the spring element.