The study takes sample from customers of Nike and bases on customers’ perspective to understand their actual demand on brand to provide the owners a reference on brand image. Thus, the study aims to explore the relationship between brand image and purchasing intention, relationship between brand image and brand trust, and whether each of brand trust and purchasing intention has any mediating effect on brand image , and then, from empirical perspective, to construct relative knowledge accordingly. The study uses convenient sampling to issue questionnaire surveys on customers that have purchased th products of Nike within the past two years. Sample were taken daily from July 15, 2011 to Aug 31, 2011. The total of surveys issued is 275. After deleting invalid and incomplete one, the valid sample is 220, which is 80% returning rate. The study applies hierarchical regression analysis and obtains results as follows: 1. Brand image has a significantly partial positive effect on purchasing intention . 2. Brand image b has a significantly partial positive effect on brand trust. 3. Brand trust has a significantly partial positive effect on purchasing intention. 4. Brand trust has a partial mediating effect on brand image and purchasing intention.