A business cartel is a business that is carried out by business actors to obtain market power by regulating the market by fixing prices, for example, by limiting the availabil- ity of commodities on the market. This paper examines in detail business cartel prac- tices in Indonesia, explores their impact on the economy, and analyzes KPPU as an unfair business eradication body. In so doing, this paper analyzes eight business cases in Indonesia to describe and evaluate the practices of economic cartels in the industry. Those cases were randomly chosen for different periods and different industrial sectors. Using a qualitative analysis method, it is found that business cartels, unfortunately, are still rather common practice in Indonesia. It is also found that business cartels harm economic development, citizens and customers, since they tend to be monopolistic practices so that the customers will have to pay high prices for limited commodities. In addition, KPPU needs to be reformed, and the amendment of current antitrust law also needs to be executed. Consequently, judges and lawmakers should understand the balance of business interest and public interest at the same time.