The tourist industry plays a major role in the world economy. Besides creating a variety of revenue-generating opportunities, tourism also causes several issues for society at large. Tourists may engage in a variety of irresponsible behaviors like littering, using unsanitary restrooms, public smoking, vying for seats, talking loudly, taking pictures without permission, picking flowers, etc., which could hinder the growth of sustainable tourism destinations. It's equally critical to comprehend the elements that lead to responsible tourism practices and the reasons behind irresponsible tourism practices. Therefore, encouraging responsible tourism could be a key priority for countries looking to increase tourism's competitiveness. The purpose of this study is to investigate the variables that affect visitors' responsible travel practices. Investigating the connections between attitude, subjective norm, perceived behavioral control and social norms in relation to responsible tourism behavior is the aim of this study. This study presents a theoretical framework using TPB. The study evaluates the relationship between attitude, subjective norm, and perceived behavioral control using social norms as the mediating variable and also the relationship between attitude, subjective norm, and perceived behavioral control using government policy as the moderating variable. Convenient sampling was employed to gather data from 421 respondents using a questionnaire, and PLS-SEM software was utilized for data analysis. The findings show that social norms partially mediate the relationship between attitude, subjective norms, and perceived behavioral control, and responsible tourism behavior; and attitude, perceived behavioral control, and social norms have a significant direct influence on responsible tourism behavior. Moreover, it has been revealed that government policy as a moderator doesn’t have any significant effect in the relationship between attitude, subjective norms and perceived behavioral control. The findings of this study would contribute to both practitioners and academics to develop better strategies to improve the tourists’ behavior in the spots.