The present invention relates to a drying device for drying agricultural products such as shiitake mushrooms and aquatic products such as dried persimmon leaves, wherein a suction fan is installed on the air exhaust side of the drying chamber, whereby the humidifier of the drying chamber is sucked by the suction force of the suction fan, The present invention relates to a drying apparatus for agricultural and marine products having a low noise and high efficiency that can dry high quality agricultural and marine products through uniform drying while significantly reducing noise compared with the conventional art. A drying chamber 110 for drying agricultural and marine products is formed in the upper part of the drying chamber 110. An upper part of the drying chamber 110 is partitioned by an upper partition 120 to provide an air passage 150, An air supply port 130 is formed at one side of the upper part of the drying chamber 110 so that the air moved through the air path 150 is supplied to one side of the drying chamber 110, A dryer main body 100 formed with a side surface partition 140； A suction fan 200 provided on the air transfer path 150 at the other side of the upper partition 120 for sucking a humidifier present in the drying chamber 110； A heat exchange inlet 250 which is formed to communicate with the air inlet portion of the heat exchanger 400 on the surface of the side partition 140 to guide the humidifier in the drying chamber into the heat exchanger 400 during operation of the suction fan 200, ； A humidity sensor (300) installed on one side of the drying chamber (110) for measuring the humidity in the drying chamber (110)； And is opened in the surface of the side partition 140 so as not to communicate with the heat exchanger 400 and is opened when the humidity is lower than the humidity set in accordance with the measurement information of the humidity sensor 300. In operation of the suction fan 200, To the air passage 150； A heat exchanger (400) provide
