The purpose of this study to analyze the importance of implementing a work safety management system on the performance of construction projects by examining several factors behind the problems at PT Jaya Kontruksi MP. The analysis method used is multiple regression analysis. The data used in this study are primary data with a measuring instrument in the form of a questionnaire. The population in this study were all employees of the construction division at PT Jaya Kontruksi MP, Tbk, totaling 40 people and the sample used was the entire population (saturated sample). The results showed that there was a partially positive and significant influence of top management commitment to construction project performance, K3 regulations and procedures on construction project performance, worker communication on construction project performance worker competence on construction project performance, work environment on construction project performance and involvement workers on the performance of construction projects at the West Coast District Head Office Building, Lampung Province. In addition to the partial effect, this study also shows that there is a positive and significant effect simultaneously (together) on top management commitment, OSH regulations and procedures, worker communication, worker competence, work environment and work involvement on construction project performance. The results of this study mean that if there is an increase or increase in top management commitment, K3 regulations and procedures, worker communication, worker competence, work environment and work involvement either partially or simultaneously it will improve the performance of construction projects at PT Jaya Konstruksi Tbk.