The purpose of this study is to examine the current level of supply chain integration and to analyze its influence on ethiotelecomsâ€™ supply chain performance. The study is considered as a case study. This research conceptualizes and develops three dimensions of supply chain integration (supplier integration, customer integration and internal integration) and examines the relationships among supply chain integration dimensions and between SCI and supply chain performance (SCP). The data collection instrument used was a questionnaire which was administrated to a total sample of 286 employees using stratified sampling techniques.Statistical techniques such as descriptive statistics, correlation, and multiple regressions were employed to analyze the data. Measured from the three dimensions of SCI, it can beconcluded that the current level of SCI of the company is low. The company has a relatively better internal integration, but its external integration (supplier and customer integrations) is week. The result of the analysis also proved thatthere is strongand significant relationship between supply chain integration and supply chain performance. Besides, SCI have a strong and positive influence on supply chainperformance. The results also indicated that customer integration had the highest effect on SCP, followed by supplier integration and internal integration. Therefore, for improving SCP, the current study recommendsimproving the three components of SCI together as they are strongly interrelated