The purpose of this research is to examine the behaviors of Adanaspor's and Adana Demirspor's supporters relevant to fanaticism, and to reveal factors causing partisanship and identification levels of partisanship with psycho-social aspects in the context of football fanaticism and supporter identity. The model of this study is screening. 160 supporters in total, as being 80 Adanaspor's supporters and 80 Adana Demirspor's supporters, are constituting the study group. In this study, Football Supporters Fanaticism Scale developed by Tasmektepli et al. (2014) has been used as data collection tool. The analysis of data has been performed by SPSS 22 packaged software. First, percentage and frequency analysis have been performed for age, educational background and profession information of each participant, and distribution (Sample K-S) and homogeneity (ANOVA) analyses have been performed in the determination of difference. As per the results of the research, while they are definitely agreeing with the judgments of "I get very angry at the comments of the speaker during live broadcasts which are against the team," "I go to the stadium for watching my team's matches," "I go to the match with clothing and materials indicating the symbols of my team," "I join all the cheering at the stadium," "I try to make the individuals or children--who don't support a team--the supporters of my team," they are definitely not agreeing with the judgments of "I may throw foreign bodies to field when I get angry during the match," "My team should try all the means including exceptions in order to win the match," "I may sometimes enter the field if the game has gone off the rails." The comparison of the teams that the supporters support and of their fanaticism attitudes has been made, and significant difference has been determined in favor of Adanaspor in the judgments of "I get very angry at the comments of the speaker during live broadcasts which are against the team" and "I go to the match with clothing and materials indicating the symbols of my team."