PURPOSE: A dehydrater for laver capable of providing dehydrated laver having high quality, equipped with a sponge for laying draining boards for the laver on the bottom of an intermittently moving conveyor with sponges for setting the draining boards on upper part of the conveyor.

CONSTITUTION: The L shaped levers 3 for supporting both ends of said draining boards are furnished to the intermittently moving endless chain 2 fixed to the frame 1, and the plural draining boards 4 for scooping and attaching the laver to the boards 4 are supported in parallel on levers 3 to form the intermittently moving conveyor 5 of the draining boads. In the upper horizontally moving part 5' of the conveyor 5 is fixed to the device frame 1, a horizontal porous plate 6, directly under the conveyor 5 and below the draining board 4, and the sponge 7 for setting the boards, intersecting perpendicularly to the moving direction of the conveyor 5, is placed on the porous plate 7 and fixed detouchably to it. The intermittently lifting 9 fixed detouchably with the ascending and descending perforated plates 10 is furnished above the moving part 5'; the sponges 12 for holding the dreining boards, facing the sponge 7, are arranged to below the ascending and descending plate 10. The sponges 12 are swing in pendency between the lock metal fittings 13 of the plates 10 and the lower supporting lever 14 or between the levers 14.