PROBLEM TO BE SOLVED: To obtain a new culture medium effective for promoting the growth of mushroom and useful microorganisms for e.g. garbage treatment by compounding a liquid extract from plant(s) belonging to Myrtaceae, Ginkgoaceae, leguminous family or Gramineae, and a liquid extract from edible fruits (dried product(s)). SOLUTION: This new culture medium is obtained by compounding a liquid extract from plant(s) belonging to Myrtaceae, Ginkgoaceae, leguminous family or Gramineae, and a liquid extract from edible fruits (dried product(s)). This culture medium is useful for culturing effective microorganisms usable for promoting the growth of mushroom's mycelia and useful microorganisms such as soil fungi used in e.g. garbage treatment. Furthermore, the mycelia of Agaricus blazei Murill can be cultured in this medium diluted with water or an aqueous medium to afford the mycelial extract of Agaricus blazei Murill having anticancer activity or carcinostatic activity as well as such activities as disease prevention, senility suppression and immunopotentiation.
