The objective of the present study was to determine the mediating effect of executive capacity for innovation between knowledge management and supply chain performance in SMEs (small and medium-sized enterprises) from the port logistics sector. Management pattern variables were assessed in SMEs that were at least five years in business and that had performed activities directly related to managing Ecuador's logistics chain. A literature review was the framework for the present study where the following variables were examined: knowledge management, executive capacity for innovation, and supply chain performance. Applying structural equations through estimates based on maximum likelihood validated the proposed model. The results showed that there was partial mediation between the examined variables. In conclusion, SMEs need innovative capacity to improve their supply chain's knowledge management and performance.