In this experiment, we studied the possible involvement of various phenolic acids in the rooting process of two chestnut hybrid clones (Marsol and Maraval Castanea crenata )C. sativa). The phenolic acids were measured in the cutting bases (root emergence zone) and in the cutting leaves. In the cutting bases, several hydroxycinnamic acids (caffeic, sinapic, ferulic and p-coumaric acid), chlorogenic and ellagic acids were observed, whereas in the cutting leaves only chlorogenic and ellagic acid were investigated. Cutting leaves of the Maraval clone contained a nearly 10 times higher concentration of chlorogenic and seven times higher concentration of ellagic acids than the Marsol clone (lower rooting capacity). In the cutting bases of the Marsol clone, overaccumulation of hydroxycinnamic acids occurred in the period of four days after having been placed in the substrate. During the same period, the concentrations of these acids in the Maraval clone decreased significantly.