EN
The subject of this article is the ontological theory of causality presented in Roman Ingarden's 'Controversy over the Existence of the World'. The peculiarity of this theory is discussed, and some differences between it and Hume's and Kant's theories are shown. The article presents Ingarden's definition of cause, the principles of causality, and rarely discussed problems connected with the analysis and division of events. The changes in the method of inquiry which occur in the third part of the 'Controversy over the Existence of the World' and which are related to the problem of causality are also examined.