Using a linear structural model, we investigated the impact of task interdependence, task and relationship conflict in a team, and team cooperation on job performance of real estate brokers in Kaohsiung, Taiwan. The empirical results showed that task interdependence significantly and positively influenced team cooperation and job performance, and significantly and negatively influenced relationship conflict. Relationship conflict significantly and negatively influenced team cooperation; task conflict positively and significantly influenced job performance; team cooperation significantly and positively influenced job performance; and trust significantly moderated the effect of task conflict on job performance. It is clear from these results that, when investigating the factors affecting real estate brokers’ job performance, it is necessary to consider the effects of task interdependence, task conflict, relationship conflict, and team cooperation, as well as the moderating effect of trust.