The effects of microsurgical denervation of the liver on blood loss, bleeding time, platelet count, and partial thromboplastin time (APT‐time) after standardized liver resection were studied in the rat. The hepatic nerves in the hepatoduodenal ligament were dyed, identified, and resected with the aid of a microsurgical technique. During the same anesthesia and also one week after denervation, a 3‐ to 4‐fold increase in blood loss and bleeding time was demonstrated when compared to sham‐operated and control rats. As a result of the increased blood loss, hemoglobin and hematocrit values fell, whereas platelet count and APT‐time were essentially unchanged. The denervation procedure had no influence on platelet aggregation. In all probability, the increased bleeding after hepatic resection in the denervated rats is a reflection of an interrupted nerve supply to the liver. The results may have interesting implications for human liver surgery.