The present invention relates to a dehydrator, and more particularly, to a technology for achieving improved dehydration efficiency as compared to conventional technologies while maintaining a volume, dehydration time, and rotational speed that are nearly the same as those of conventional technologies. To this end, the dehydrator of the present invention comprises: a main body having an installation space therein; a pipe for supplying items to be dehydrated, which is located within the installation space of the main body, one side of which has an inlet hole for items to be dehydrated that is connected to the outside, inside which a supply space connected to the inlet hole for items to be dehydrated is disposed, and the other side of which has an outlet hole connected to the supply space; a dehydration tub, which is rotatably arranged, which surrounds the pipe for supplying items to be dehydrated in the installation space, inside which a dehydration space connected to the outlet hole is arranged, the circumferential surface of which has a dehydration hole for interconnecting the dehydration space and the installation space, and one side of which has a discharge port for connecting the dehydration space to the outside; a first driving unit connected to the dehydration tub so as to rotate the dehydration tub; and a discharge guide unit located within the dehydration space so as to move the item to be dehydrated placed in the dehydration space toward the discharge port.