Sporulation patterns of rice blast fungus were studied at relatively later stages of leaf blast and neck blast seasons at leheon, Korea, by detaching lesion-bearing leaves and panicle bases. Number of conidia remained on the leaf blast lesions of different cultivars during Jut. 20 to Jut. 23 was variable ranging from 3,640 to 82,740 spores. More conidia were observed on the adaxial cells due to the release of conidia from abaxial ceIls. After heading, sporulation was observed from the lesions on the flag leaves, but the amount was less than in the late July. Detached panicle bases or uppermost internodes infected by P. grisea produced abundant amount of conidia. Among these panicle bases, 30.1 mm size lesion recorded the highest count, 224,560 spores. When we compared the sporulation amount using the KY -type spore trap, more conidia were observed from intact lesions than from the conidia and conidiophore removed ones. The ratio of conidia release against total sporulation ranged 20.5 - 25.0% for leaf blast and 8.2 - 25.3% in case of neck blast.