This study investigated narrative styles and narrative relationships that were interactionally accomplished by a researcher and participants by conducting participant observation and interviews with 10 participants in an ecotour which contributes to the sustainability of a local community and its environment. Results indicated that two interviewer-interviewee relationships, "inquirer-respondent" and "tour-participants," different from each other in terms of their narrative styles and the visualization of co-membership, were accomplished during the interviews. They correspond to the two general concepts of narrative relationships: dialogic and coexistent (Yamada, 2004), respectively. This study also revealed that there was another important relationship, the "narrating-hearing experience," which is intermediate between the other two relationships. These findings imply the possibility that participatory research to examine the joint narrative of ecotours contributes to the practice of environmental education.