One of the largest incomes in the Indonesian state lies in MSMEs (Micro Small Medium Entrerprises). MSMEs (Micro Small Medium Entrerprises) contribute greatly to GDP growth. However, there are several problems that can hinder the growth or development of MSMEs (Micro Small Medium Entrerprises) so that the level of product sales decreases, one of which is the lack of guidance from all aspects, one of which is knowledge about doing business, capital and so on, especially for pesantren product which do not have much knowledge about doing business and also guidance to start doing business. This study aims to determine and understand the problems that can hinder the increase in sales of MSMEs (Micro Small Medium Entrerprises) products, especially in East Java pesantren products. This is done to understand the impact of OPOP program coaching on increasing sales of East Java pesantren products. The method used is quantitative method and uses primary data obtained from questioners that have been filled in by respondents, namely participants in the East Java Province OPOP (One Pesantren One Product) program. The implication of this research is for OPOP to increase the coaching time or expand the OPOP program to other areas so that it can help pesantren products in increasing product sales because this program has an important role in the sustainability of increasing product sales. This study uses simple linear regression analysis, hypothesis testing analysis and requirements testing analysis to analyze data that has been collected through questioners using the SPSS (Statistical Package for Social Sciences) program. Researchers found that the coaching provided by the OPOP (One Pesantren One Product) program can have a positive effect on increasing product sales. The hypothesis results show that the OPOP (One Pesantren One Product) program coaching has an influence of 41% on the variable of increasing product sales and 59% is the influence of other variables that are not included in this study. Keywords: Coaching, OPOP, Increased Product Sales