This study examines the integration of total quality management and supply chain management and their impact on organization performance in Iran’s automotive casting industry. A conceptual model was designed to test the research hypothesises. The survey included all automotive casting manufacturers in Iran. The findings show that TQM and SCQM are positively correlated and both affect organizational performance. This findings suggest that managers of these manufacturing companies can apply TQM an SCQM approaches to achieve competitive advantages.