This research study objective is to analyze the effect of celebrity endorser, event sponsorship, perceived quality, and brand image of Oppo Smartphone purchase decision. Subjects in this study were the users of Oppo Smartphone in the city of Yogyakarta with a sample size of 200 respondents. Research methodology with purposive sampling technique of non random sampling with Structural Equation Modeling method that is processed using AMOS 22.0 program. The result of this research shows that celebrity endorser, perceived quality, and brand image have positive and significant effect on purchase decision, event sponsorship has no effect on purchase decision, brand image positively and significantly able to mediate celebrity endorser and perceived quality to purchase decision, but not able to mediate event sponsorship significantly against purchase decisions.