In the present paper, I investigate the relation between the institution of obligatory child support and libertarianism, particularly a libertarian theory of distributive justice. I demonstrate that the institution of obligatory child support is incompatible with the classical libertarian theory of distributive justice as represented by Murray N. Rothbard, Hans-Hermann Hoppe, Walter Block, Stephan Kinsella or Robert Nozick. However, the main research question that I address in the paper is: What construal of the libertarian theory of distributive justice is the institution of obligatory child support compatible with? I hypothesise that obligatory child support is compatible with the libertarian theory of distributive justice interpreted in terms of the “finders-creators ethic”, as represented by Israel M. Kirzner. To inquire into the main research problem, I employ the method of reflective equilibrium.