Abstract: Provided is a serial-type planar heat-generating heater and a manufacturing method thereof. In particular, the present invention relates to a serial-type planar heat-generating heater, which is capable of maximizing the effect of heating by minimizing dead zones in which heat is not generated, achieving a maximum power output in a limited area, unlike in a parallel-type heater, and achieving high temperature uniformity in all of heat-generating surfaces of the planar heat-generating heater, is easy to design to control heating performance, and may be manufactured at low costs; and a manufacturing method thereof.