Abstract: This study aims to detect the impact of leadership practices constructs, i.e. Model the way, Inspire a shared vision, challenge the process, enable others to act and encourage the heart (using the leadership practices inventory) on family business performance among first generation leaders in the selected Lebanese family businesses context. This study adopted the survey method to collect primary data. A questionnaire was distributed in person and in online by Google-Forms for data collection to around 300 family business leaders, out of which 267 completed questionnaires were obtained. The data were collected during the period from 06-02-2020 to 31-05-2020. Finally, 115 complete questionnaires were used in data analysis (n = 115) for first generation leaders. The reliability and validity of the dimensions are evaluated by Confirmatory Factor Analysis (CFA) and the hypothesis have been tested by using structural equational modelling SEM. The interpretation analysis of the results indicate that Inspire a shared vision, challenge the process does not have a positive impact on family business performance while model the way, enable others to act and encourage the heart have a positive and significant impact on family business performance of the first generation family business leaders. Thus, this study provides a better understanding of the effects of leadership practices. The results of this study have the potential to help the family business leaders in Lebanon to improve model the way, enable others to act and encourage the heart, in turn, Lebanese family business leaders will be able to achieve superior family business performance among first generation.