The subject innovation can be an electric heater which is a heat source for a heater mounting unit for a cooking utensil having a bottom surface, also by improving the mounting structure of the heater so that further simplifies the mounting operation of the heater and at the same time maintaining a uniform temperature as a whole bottom surface of the main body It will have to be able to.; To this end, according to the cooker the heat source heater (2) fixed to the bottom surface of the main body 1, to form a receiving space 6 of the same shape as that of the heater 2 in the preferred aluminum plate (5) Thermal Conductivity in which the heater (2) into the receiving space to the internal state welded to a lower surface of the aluminum plate (5), the body (1).
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