A fryer includes: an oil tank; and a heater, the fryer being configured to heat a frying oil stored in the oil tank by the heater so as to fry a food material put into the oil tank, the oil tank including an upper oil tank in which the heater is arranged and the food material is to be fried, and a lower oil tank provided below the upper oil tank so as to be continuous with the upper oil tank, and configured to sink and collect moisture and fried scraps released from the food material into the upper oil tank, the heater including a side heater partitioning an inside of the upper oil tank into one or a plurality of cooking areas, and surrounding the one or the plurality of cooking areas, and a lower heater provided at a bottom of the one or the plurality of cooking areas.