The present invention relates to a red pepper dryer having a magnetron capable of quickly and uniformly drying red peppers stored in a rotary drum made of a rectangular cylinder having at least six peripheral faces in the circumferential direction by a microwave generated from a magnetron, 153) and a door (154)； A driving motor 160 installed outside the housing 150 to generate rotational power； A driving shaft 110 coupled to one side of the driving motor 160 and coupled to one side of the drum 100 to transmit rotational power of the driving motor 160 to the drum 100； A drum 100 installed inside the housing 150 and rotated by receiving rotational force from the driving shaft 110 to receive the pepper therein； A sensor hole 121 formed in the axial direction for installing a temperature sensor 141 coupled to the other side of the drum 100 and supported by the bearing 152 and rotating and sensing a hot pepper drying temperature inside the drum 100； A support shaft 120 provided with the support shaft 120； A magnetron (130) installed inside the housing (150) and generating a microwave for drying the red pepper accommodated in the drum (100)； And a sensor 140 including a temperature sensor 141 for sensing a drying temperature of the inside of the drum 100 and a humidity sensor 142 for sensing humidity inside the housing 150, And a control unit (170) for controlling the operation of the drum (130), wherein the drum (100) is formed by a rectangular cylindrical body having at least six peripheral surfaces in the circumferential direction, (102) provided on at least one surface selected from the respective surfaces of the cylinder and an opening / closing door (103) for opening / closing the opening (102) ).본 발명은 원주방향의 외주면이 적어도 6면 이상으로 이루어진 각형의 통체로 이루어진 회전드럼에 저장된 고추를 마그네트론에서 발생하는 마이크로파로 신속하고 고르게 건조시킬 수 있는 마그네트론을 구비한 고추 건조기에 관한 것으로, 배출구(153)와 도어(154)를 구비하는 하우징(150)과； 상기 하우징(150)의 외측에 설치되어 회전 동력을 발생시키는 구동모터(160)와； 상기 구동모터(160)와 일측이 결합되고 타측이 드럼(100)의 일측과 결합되어 상기 구동모터(160)의 회전 동력을
