Social media makes it easier for individuals to connect with other individuals and be able to reach the world more broadly. One of the social media that attracts attention is Instagram. In recent years, social media has become one of the most popular social media for teenagers to take content (photos or videos). Instagram, which is a digital album for its users, is often used by teenagers to post content that can increase their self-confidence. This article aims to examine how far the impact of Instagram social media can increase adolescent self-confidence. This study uses a qualitative approach with the case study method, and uses data collection techniques, in-depth interviews and documentation studies. Interviews were conducted with 3 adolescent Instagram social media users as the main informants, and the supporting informants were experts, namely psychologists. Documentation studies were conducted by looking at relevant literature regarding the phenomenon of Instagram use by adolescents.The results of the study show that teenagers' self-confidence from the existence of Instagram social media is shown by how many of their posts receive likes. An interesting finding is that teenagers often make selfies an activity that can increase or decrease their self-confidence..