Dehydration aid, method for producing same, and method for dehydrating sludge

The invention provides a dehydration auxiliary agent with excellent performance of reducing water content of sludge, a manufacturing method of the dehydration auxiliary agent and a dehydration method of the sludge. A dehydration aid, which is particles containing (1) a polysaccharide, (2) at least one saccharide selected from the group consisting of monosaccharides and oligosaccharides, and (3) a polymer compound, and a method for producing the dehydration aid, the method comprising: a kneading step of kneading (1) the polysaccharide, (2) at least one saccharide selected from the group consisting of monosaccharides and oligosaccharides, (3) a polymer compound, and (4) water to obtain a kneaded product; a granulation step in which the kneaded product is granulated by extrusion granulation or agitation granulation to obtain particles; a drying step for drying the particles to obtain a dried product; a crushing step for crushing the dried product to obtain a crushed product; and a classification step in which th