The objective of the article is to analyze the difference between environmental responsible behaviors by socio- demographic characteristics of managers. Based on primary data collected by surveying 134 top managers of 134 accommodations (including: 3 five star hotels, 6 four star hotels, 11 three star hotels, 30 two star hotels, 27 one star hotels, 29 unrated hotels, 20 guest houses/tourist motels, 5 homestays and 3 others) in Can Tho City, Vietnam, descriptive statistical analysis, Cronbach's alpha, T-test and Anova were applied. Environmental responsible behavior of managers is classified into 3 groups: direct behavior, indirect behavior and general behavior. The research results showed that: (1) There are differences in 3 types of behavior according to years of working experience in the tourism industry and according to years of working as a manager; (2) Managers of different age groups have different indirect and general behavior, but do not have differences in terms of direct behavior; (3) No difference was found in environmental responsible behavior by positions, gender and education level of managers.