Abstract: The present invention relates to a frying device which can prevent the sediments of cooked food from sticking to the upper side of an inclined lower plate that forms an oil cask through the circulation of oil filled inside the oil cask, the frying device comprising: a case; an oil cask; two ultrasonic vibration units provided in the front part and the rear part of the oil cask; two heater units provided on both sides of the oil cask; a sediment collection cask fixed so as to communicate with the oil cask; a filtering circulation unit provided between the sediment collection cask and the oil cask; and a control unit for controlling the ultrasonic vibration units, the heater units, and the filtering circulation unit, and having an operating portion connected thereto.