PROBLEM TO BE SOLVED: To provide a method of producing earthworm decayed soil simply and efficiently.SOLUTION: A method of producing earthworm decayed soil of this invention includes: a feeding starting step of putting earthworm together with feeding stuff including at least waste cultivation bed as a raw material into a feeding container, where a monthly amount to be put of the waste cultivation bed into the feeding container is 0.02-0.07 m3/m2, the unit being the bed amount to be put per container bottom area; a feeding step of feeding the earthworm while additionally putting the feeding stuff including at least waste cultivation bed into the container such that a monthly additional putting amount per container bottom area is 0.02-0.07 m3/m2; and a recovery step of recovering the earthworm decayed soil.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】ミミズ糞土を簡便にかつ効率よく生産できる方法の提供を目的とする。【解決手段】本発明は、廃菌床を少なくとも原料とする飼料と共にミミズを飼育容器内に投入し、廃菌床の飼育容器への投入量が、1か月あたりの、容器の底面積あたりの量として0.02~0.07m3/m2である、飼育開始工程、1か月あたりの追加投入量が容器底面積あたり0.02~0.07m3/m2となるように、廃菌床を少なくとも含む飼料を容器に追加投入しながらミミズを飼育する、飼育工程、及びミミズ糞土を回収する、回収工程を含む、ミミズ糞土の製造方法を提供する。【選択図】なし