Customer involvement in new product development enables some companies to identify complex and dynamic environments and adjust themselves with them by receiving information and knowledge from the customers. For an industrial firm to be successful within the market, it is essential to focus on improving the capability of developing new products. The purpose of this study is to examining the role of customer involvement in new product development. The conceptual model and the research hypotheses have been determined according to a literature review of this realm. In this study, sampling is judgmental done of managers, suppliers, sellers and customers in Yazd tile industries. The data are collected using a questionnaire, and data analysis serves to evaluate the hypothesis through structural equation modeling (SEM) and the method of Partial Least Squares (PLS). The results reveal that the relationship between customer involvement and new product development is positive and significant. Also, through the hypothesis, this relationship is held corresponding to the mediator variable of new product performance, which shows that the impact of customer involvement on new product development is positive and significant.