Collaboration between companies and social media influencers is becoming a popular promotional strategy for many marketers, with perceived credibility highlighted as a key factor for success. It not only helps build long-term relationships with followers but also increases purchase intentions, fosters loyalty and enhances the effectiveness of the influencer's advertising message. Therefore, to better understand the importance of the role of perceived credibility in influencer marketing, it was crucial to investigate the factors that affect it. Namely, Instagram is the most effective social network for Influencer Marketing, which is the focus of this research, especially in the context of generation Z, since they are the future key group of consumers. The findings of this research provide relevant insights into the perception of influencer marketing, relevant for companies to adjust future marketing strategies. The aim of this paper was to investigate the role of perceived credibility in influencer marketing among Generation Z. A quantitative study was conducted on a deliberate convenience sample of at least 100 respondents, members of Generation Z, using an electronic survey questionnaire as the research instrument. The research was created based on scientific papers by authors Belanche et al. (2021) and Herrando and Martín-De Hoyos (2022), The research results showed that the most important factor in the perception of influencer marketing credibility is the attitude towards the influencer and the perceived credibility of the influencer, while less significant factors are the attitude towards the advertisement and the evaluation of the advertisement.