This article seeks to investigate the connection between leadership qualities and sustainable competitive advantage. The research was conducted at small and medium-sized businesses in Erbil. This study assessed the influence of leadership qualities (behaviour-focused strategies, natural reward strategies, and constructive thought patterns) on small and medium-sized firms' sustainable competitive advantage. The researchers employed basic regression analysis to determine the impact of each independent variable on small and medium-sized businesses' sustained competitive advantage in the Erbil City of Kurdistan. There were a total of 280 questionnaires sent, but only 228 individuals accurately filled them out. The findings suggested that behaviour-focused strategies as a leadership quality on sustainable competitive advantage had the largest effect, while constructive thinking