In this paper, we discuss turn-taking in chat conversation by analyzing typing his-tories. From these typing histories, it emerges that users of chat systems begin making their next utterances before their partners finish making their comments, and that they tend to continue making their present utterance even if the other”Ēs utterance, which isn”Ēt semantically related to their utterance, is shown on their dis-play. These facts suggest that chat system users tend to make utterances in their own way without being limited by others. Al-though other researchers have explained that the lack of timing information leads to complexity in the history of chat and difficulty in pursuing topics, chat users may create multiple threads on purpose, in order to develop many topics simulta-neously.