To provide a seaweed drying device capable of greatly reducing labor and drying high-quality seaweeds.

This seaweed drying device has a house 1 form and dries seaweeds in the house 1 through hanging products to be processed 51 on a seaweed hanging shelf 5 on the upper part of its inside. The device is composed of a blower 2 set on the upper part of the seaweed hanging shelf 5 and blowing toward the seaweed hanging shelf 5, an exhaust fan 3 for exhausting set on a side face of the house 1, and radiational type drying heat sources 40 and 41 for irradiating and drying toward the seaweed hanging shelf 5. Space between products to be processed 51 adjacent to each other and hanging on the seaweed hanging shelf 5 is formed toward the exhaust fan 3.