This research aims to evaluate perception of Gen Z customers in Vietnam on characteristics of influencers. Six characteristics of influencers, including trustworthiness, attractiveness, expertise, familiarity, brand-influencer congruence, and negative publicity will be explored. Quantitative approach with a sample size of 600, and snowball sampling method have been used to achieve such aim. Cronbach Alpha and descriptive statistics are the main analysis methods used in this research. The results show that the majority of the social media influencers that have an impact on Gen Z's online purchasing behavior have a fairly high level of almost 5 out of 6 characteristics. This somehow implies that information provided by a well-known influencer will drastically alter the internet purchase behavior of Generation Z.