A corporate network is defined by the positions that companies share in the directories of other firms. This research suggests that, despite some public role of business associations, Peruvian corporate network has lost cohesion in the last twenty years. For the first time you can find business groups that share fewer or no directors with companies of the other groups. However, the centrality has settled in the network of the financial sector. In this context, the problem is to understand how the Peruvian business community has organized itself in time, assuming that firms seek to relate to each other for individual and collective benefits. This research also seeks to meet entrepreneurs and major companies to have a local business profile and know the importance and the role that certain business institutions in Peru have, such as economic groups and business associations.