In this paper, we study a division between market corruption—impersonal bribery—and network corruption that operates through social connections. We provide a thorough theoretical discussion of this division, compare it with other categorizations of corruption, and also demonstrate differences between market and network corruption existing in practice. Using data from the World Economic Forum in the period from 2007 to 2016 we measure market and network corruption across about 150 countries all over the globe and show that network corruption is more related to countries’ cultural backgrounds and more harmful to investments than market corruption. Overall, our paper argues that the market-network dimension, unfairly abandoned in the literature, may be useful for better understanding of such a complex phenomenon as corruption.