Method of artificially growing edible fungi

A method for artificially growing shiitake or hiratake comprising the steps of setting the edible fungus sporiferous source in a nutrient medium, culturing the inoculated original hypha in a cultivation room at a temperature of from 18.degree. to 20.degree. C and 60% relative humidity wherein the surface of the nutrient medium is illuminated at a luminous intensity of 30 to 50 lux until the hypha become prevalent over the nutrient medium surface, and subjecting the prevalent hypha to a high temperature treatment at between 25.degree. to 32.degree. C for 24 to 48 hours and then to a low temperature treatment at between 5.degree. to 8.degree. for 3 to 5 days, wherein during the high and low temperature treatments of the prevalent hypha the surface of the nutrient medium were illuminated at a luminous intensity of 100 to 120 lux and oxygen is forcibly supplied into a polyethylene sack accomodating the nutrient medium when the medium is taken out together with the sack from a cultivation vessel and dipping the nutrient medium into water at a temperature of from 3.degree. to 6.degree. C for 24 to 48 hours and then placing the hypha in a room at 10.degree. to 16.degree. C having a relative humidity of 90% and recovering the fungus.