Behavioral design of robot is one of the concerns in the human-robot interaction [1, 2]. About the design of human-robot communicative interaction, there are lots of approaches have been presented for finding the preferable behaviors that are accepted by the people. In these studies, the users impressions of robots during interactions with them have been focused on the initiatives of the users, with users evaluating the response of the robot. Conversely, there have less studies on the evaluations on human impressions when a robot takes the initiative and performs active behavior towards a human. While creating events in which a robot explicitly performed active behavior, we reviewed human-robot interactions and presented our behavioral designs. Based on that, we implemented greeting functions for the robot. The objective of this study is to investigate the users’ impressions on the robot especially with the activeness of the robot. We examined the differences in their impressions depending on with or without of active behavior of robot. The results show significant differences in activity, affinity, and intentionality.