Abstract: The main aim of this study was to assess the relationship between relational behaviour and the performance of manufacturing firms in Kenya. While the internal and external environmental factors are pushing businesses to undergo tremendous changes, the supply chain management is becoming one of the core areas that organizations need to align for continued performance. The manufacturing sector in Kenya, although it is one of the critical sectors in the country’s economy, has been undergoing through turbulent times in the recent past where over 40% of the industry’s leading companies have been posting declined revenues and the profit margin. The tussle of relational behaviour as an aspect of supply chain alignment has however not been adequately addressed in the sector