Volunteer travel opportunities are more plentiful than ever and are now offered worldwide, with conservation projects being an increasingly popular choice. Some of the emerging questions in this field are concerned with the effective communication of these opportunities to young people. One theory that could guide the creation of these persuasive campaigns for conservation volunteering is regulatory focus theory. By adopting this theory, we reveal yet another possibility for understanding motivations of conservation volunteers. Results of the experiment suggest promotion messages are better received (more persuasive) because they induce expectations in line with general view of conservation volunteering as a hedonic experience. Moreover, this study is the first one of its kind to show this important effect of environmental attitudes on individuals' responses to promotional messages about conservation volunteering travel.Résumé Les occasions de voyage bénévole sont plus nombreuses que jamais et désormais offertes partout dans le monde, les projets de conservation en constituant un choix de plus en plus populaire. Dans ce domaine, des questions émergentes portent sur la communication efficace de ces occasions aux jeunes. Une des théories qui pourraient orienter la création de ces campagnes de persuasion pour le bénévolat dans le domaine de la conservation est la théorie à focalisation réglementaire. En l'adoptant, nous pouvons mieux comprendre les motivations des bénévoles oeuvrant dans le domaine de la conservation. Les résultats de l'expérimentation suggèrent & Marianna Strzelecka marianna.strzelecka@lnu.se