This study aims to investigate how emotional brand attachment contributes to attitude toward brand extension. Data were collected from 1236 users of Apple and Samsung Smartphones using structured questionnaire and analyzed by structural equation modeling using AMOS. First, emotional brand attachment significantly affects attitudinal loyalty, commitment, and customer satisfaction. These attitudes, in turn, have positive effects on attitude toward brand extension of which the impact of customer satisfaction on attitude toward the brand extension is noticeable. These effects, however, are different across different groups of customers (i.e. gender, marital status, and education).