The purpose of the research is to validate the model of participation of youth non-governmental organizations in public benefit affairs with a social marketing approach. The current research is cross-sectional in terms of practical purpose, from the time dimension; And in terms of a subject, it is in the field of social marketing management. The quantitative research method has been carried out by survey method. The statistical population includes all the directors of non-governmental youth organizations in the country, which in 1402 were equal to 4306 people, based on Cochran's formula, 350 people were selected using available sampling method. Data have been analyzed using Spss and LISREL software. The results of the confirmatory factor analysis showed that all research models are valid and fitted, and the results of the structural equation model show that the variable of causal factors with a standard effect coefficient (0.88) has a significant and positive effect on the central phenomenon variable. Also, contextual factors with a standard impact factor (0.90), intervening factors variable with a standard impact factor (0.69) and central phenomenon variable with a standard impact factor (0.86) have a positive and significant impact on research strategies. Finally, the strategy variable has a positive and significant effect on the results with a standard impact coefficient (0.92). The findings showed that the research model is valid and has good fit indices. Therefore, it is suggested that the social marketing approach can be used by the country's youth leaders to develop beneficial behaviors among the youth.

Keywords: non-governmental organizations, youth, social participation, social marketing, public benefit affairs