Disclosed is a dryer for a medical capsule. The dryer has a body including a rectangular frame and a dry box installed in the body. A gear wheel installed in the body and a gear array is formed in the dry box to engage with the gear wheel. Guide rollers are rotatably installed at both sides of an upper portion of the gear wheel, and a cover is provided to cover the dry box, which is accommodated in the body while partially protruding upward out of the body. A front plate is provided to open/close a front portion of the rectangular frame of the body, and a support plate is provided at a rear portion of the front plate in line with the guide rollers to support the dry box coming out of the body.