Many companies have been seeking innovative ways to improve performance and sustain competitive advantage. Various strategic techniques and methodologies have been developed for business improvement. Performance benchmarking is one of the business management tools that has been proven effective to maximise performance in many areas. This paper selects 'performance benchmarking' to assess and find the best practice as knowledge and know-how from learning from other companies, competitors and industry leaders to gain the competitive advantage in global competition. This paper has a more specific aim to contribute to the field of related literature is especially focus on performance benchmarking and case study. Moreover, this paper is separate for four themes including, first, studying of performance benchmarking practice. Second, discussion of implementing performance benchmarking. Third, performance benchmarking for building best practices. Fourth, the case study of performance benchmarking. All five case studies are analysed in four indicators as follow: operation performance, organisation performance, business performance and quality management. Finally, five case studies are including manufacturing sector, construction industry, furniture manufacturer industry, health service sector industry and financial institution. Finally, conclusion and suggestion are presented.