A cooking appliance includes: an input part for inputting manipulations for cooking; a cooking grill formed with a controller for outputting a control signal according to the input from the input part and a grill section for contacting food; and a panel heater in the shape of a panel formed in the cooking grill to be controlled by the controller for supplying heat to the grill section, wherein the heat of the panel heater is transmitted concentratedly to the grill section of the cooking grill and the grill section is heated concentratedly so as to cook the food, thereby minimizing the loss of heat and making grill marks appear more clearly on the object.