This paper studies how audiences should be expressed in a Cyber-theater, in which remotely located persons can direct plays as directors, perform as performers and/or see the performances as audiences through a networked virtual environment. It is noted that the audience effect has been widely acknowledged in the real-world theater: that is, the audience reaction has a significant effect on the acting of player and performance of the play itself. However, only a few works relevant to audiences in the cyber theater can be seen. This paper studies whether the audience effect exists also in the cyber-theater. By constructing, a system in which two actors are displayed a remotely located audience's avatar in which the audience can display his/her emotional actions, we clarified that interaction between the actors and audiences are effective.