Dajoa oyster mushroom was bred in Mushroom Research Institute in 2004. This oyster mushroom was bred and cultivated one after mating single spores collected from Boonli 89-1 and ASI 2018-249. The major characteristics of the mushroom were showing a lot of pinheadings, the gray-colored and infundibuliform pileus. The optimum temperature for the mycelial growth was around 26∼28℃ and that for the pinheading and growth of fruitbody was around 15∼18℃. Incubation period were required around 24 days with bottle culture and about 21days in P.Pvinyl bag culture. The yields was shown high by 140.7g/bottle and 260.3g/P.P vinyl bag.