There is little research on volunteer tourism to primate sanctuaries. The purpose of this study was to help fill this knowledge gap and gain insights into how animal sanctuaries with volunteers in Costa Rica can be improved operationally to strengthen their conservation efforts. My research questions were: 1. How does volunteer tourism with primates in Costa Rica affect volunteers? 2. How does this volunteer tourism affect Costa Rica’s environment? The methodology used was an exploratory qualitative design that included a literature review of previous research and case studies and a visit with interviews at a primate sanctuary in Costa Rica. The findings did not generate sufficient data to answer the first research question. I did find that altruism was a key factor in recruiting effective volunteers. The study also found that conservation in Costa Rica relies on volunteer tourism to fill a human resource gap. This research will allow sanctuaries in Costa Rica to respond better to protect biodiversity.