This study made empirical reviews regarding the moment of which silence occurs in everyday conversations and animation conversations and functions and roles played by silence. The analysis results of this study can be summarized as follows: (A) Silence observed during the process of which the speaker carries on with the talk in everyday conversations can be understood as a signal that the speaker is thinking about what to utter in the mutual actions and a signal requiring the listener’s reaction. Silence observed along with the filler is interpreted as silence representing maintenance of the speaker’s turn to speak. Moreover, silence observed before dispreferred utterance and response utterance is identified as a signal implying dispreferred utterance, answer holding or avoidance, while silence longer than usual is often understood as a proper place to introduce a new topic. (B) Silence of the speaker observed in animation conversations in which all utterance processes are previously written and the dubbing artists act as the screenplay says is used as a means of delivering the content of utterance with clarity. On the other hand, silence used along with filler and silence used before dispreferred utterance and response utterance is utilized as a means of creating personality and psychological state of the characters. Silence observed in the scene of topic change that is longer than usual is used as a means of representing relationship among characters and creating scenes. According to the analysis results, silence in everyday conversations plays a role in boosting smooth communication with the counterpart, while silence in animation conversations play a role in expressing personality and psychological attitude and representing relationship among characters and creating scenes.