This study aims to clarify the impact of selected sentence-level and word-level factors on stuttering in free conversation among Japanese elementary school children who stutter（CWS）．We examined 17 Japanese CWS（age: 6-11 years）and collected spontaneous utterances in free conversations. Binomial logistic regression analysis was performed. With respect to sentence-level factors, sentence length significantly　influenced stuttering, but syntactic complexity did not. With respect to word-level factors, the syllable structure of the bunsetsu-onset position, bi-mora frequency, and bunsetsu length significantly influenced the occurrence of stuttering. With respect to the other factors, utterance position significantly affected the occurrence of stuttering （p=0.000）．Additionally, the impact of sentence length was the smallest among the significant predictors of stuttering. Based on these results, we consider that the occurrence of stuttering is more affected by word-level factors rather than sentencelevel factors in the free conversation of Japanese elementary school CWS.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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