To provide a wood dryer capable of uniformly drying the wood as a whole, in the wood dryer for drying the wood by applying microwave power to the wood such as a pole and round wood.

An applicator 21 for applying the microwave power to the wood 20 is formed into a long box-shaped body having a quadrilateral cross-section composed of a ceiling wall 21a, right and left walls 21b and a bottom plate wall 21c, a roller conveyor 34 is disposed roughly at the center in the applicator 21, furthermore, microwave power irradiation antennas 26a-26d are disposed on the right and left walls 21b at an upper part of a roller of the roller conveyor 34, microwave power irradiation antennas 31a-31d are disposed on the right and left walls 21b at a lower part of the roller of the roller conveyor 34, the upper irradiation antennas 26a-26d apply the microwave power toward the ceiling wall 21a, and the lower irradiation antennas 31a-31d apply the microwave power toward the bottom plate wall 21c.