Lately, brand communities have been a heavily researched topic in marketing science. Prior work on brand communities has proved that community participation has a positive influence on brand loyalty. One of the key factors is the concept of identification with the brand community (Algesheimer et al., 2005). However, the leading factor for identification with the community has seldom been investigated (Miyazawa, 2011). Additionally, while previous empirical researches were focused on brand community of consumer goods such as car clubs, there is no research about brand community of professional sports clubs. Thus, the purpose of our study is to (1) verify a conceptual model of how different aspects of members' relationships with the brand community of professional sports club influence their intentions and behaviors, based on Algesheimer et al. (2005), (2) construct and estimate a conceptual model of the leading factor of identification with the community.