Social media is basically for sharing information and public channels to express the account owners. To date, Instagram is one of the largest social media networking platforms with visual outputs like videos and photos. Much information can be exchanged and retrieved between users via this platform. Occasionally, some users have posted other people's privacy on their feeds, which may result in a lawsuit against the Instagram account owners. This present study aims to examine the level of understanding of Instagram users' privacy management of their accounts. The data was collected through in-depth interviews with a total of three respondents and the analysis method of Communication Privacy Management (CPM) was carried out. The result shown that in self-disclosure through Instagram not all informants are able to set public and private boundaries. After interviewing, all informants have shown a better understanding of various violations of privacy, such as data leaks, cyber-stalking, taking and uploading photos or videos without permission, and ignoring copyright. In post-event, all the informant perform take action on the management of privacy with consideration as an important thing for building a relationship. Keyword : Instagram, Media Social, Communication Privacy Management.