The current research had identified the contributing sources for the substance of environmental responsible behavior (ERB) in mountain tourism in Kampaengpet Province, Thailand. Kampaengpet Provinces, Thailand's economy grew significantly as a result of its involvement. This development could be maximized if the environmental responsible behavior is increased. Various studies mentioned in the literature that tourist experience and place attachment played an important role to enhance the environmental behavior. Consequently, the present research objective was to evaluate the moderating effect of place attachment between the association of tourist experience and environmental responsible behavior. To get this objective, the data was collected from the tourist which were came for visit. The key findings had shown that tourist responsible behavior directly positively and significantly effect by tourism experience. While place attachment has a moderating influence on the association between tourist experience and environmentally responsible behavior, it also has a moderating effect on the relationship between tourist experience and environmental responsibility. Theoretically, the present study tested a moderating effect of place attachment which also has a significant moderating between the association of tourist experience and tourist environmental experience.