Moisture absorbing efficiency of excrement is enhanced by providing a high degree of porosity and a high porosity ratio to a hydraulic granulated body and a non-hydraulic granulated body in a method of manufacturing a granulated body for absorbing excrement of animals. There is provided a method of manufacturing a granulated body for absorbing excrement of animals, characterized in that dry bamboo fibers and wood fibers are used as a chief material. The dry bamboo fibers and wood fibers are mixed with each other while adding moisture thereto and the dry bamboo fibers are allowed to absorb the moisture. The resultant is granulated to form a wet granulated body, hot air is blown to the wet granulated body, and the moisture absorbed in the dry bamboo fiber is transpired outward through the wet granulated body by the hot air. A porous structure in the dry bamboo fibers in the wet granulated body is produced by the transpiration due to formation of transpiring paths in the wet granulated body.