Purpose -Supply chain performance has received a lot of attention in all companies as contemporary business organizations seek to find various methods to achieve competitive advantage and thus maximize profit for the group of investors and other shareholders. This research aims to identify the role of total quality management practices in improving supply chain performance in 11 manufacturing firms in Burg El-Arab city at Alexandria. Design/methodology/approach -For the purposes of the study, the 4 dimensions of quality principles (strategic quality planning, supplier relations management, customer focus and management commitment) were used to check their impact on supply chain performance from the perspectives of 36 managers from the studied firms. The multiple regression analysis is used to test the research hypotheses.Findings -The results showed that the supply chain performance is influenced by the strategic quality planning (Sig= 0.014), the supplier relations management (Sig= 0.005), the customer focus (Sig= 0.017) and the management commitment (Sig= 0.004). Thus, all 4 hypotheses of the research were accepted.Research limitations/implications -The findings were related to only 11 manufacturing firms in Burg El-Arab city at Alexandria and belongs theThe Effect of Total Quality Management in Improving Supply Chain Performance 926 impact of only 4 dimensions of quality principles on supply chain performance.Originality/value -There is a noticeable shortage in researchers that focus on the impact of TQM on the performance of supply chain in manufacturing firms in Egypt. The assessment of quality practices isn't easy because of their intangible nature. This research offering useful findings those help in supporting supply chain performance in manufacturing firms.