Background and Aims: Fomes fomentarius (L.) Fr. (jar fungus) has been used extensively in the past by surgeons, barbers, dentists, and is therefore called surgeon's fungus. The hemostatic properties of F. fomentarius extracts are important in medicine. The aim of this study was to investigate the effect of the gel formulation obtained from Fomes Fomentarius on bleeding and clotting time in rat models. Methods: The gel was made for this purpose and a cross-linked polymer of acrylic acid was used as a gelling agent. Results: The outcomes of the characterization analysis indicate the development of a successful gel formulation with optimum characteristics. Data from the antimicrobial study showed a good inhibition zone, with the strongest values against Klebsiella pneumoniae, Candida krusei, C. tropicalis, C. guilliermondii. The gel administration shortened the hemostasis time after bleeding from skin incisions by 63.9% and tail incisions by 55.63% from the original time. For coagulation time, these results are determined as 71.56% from the original time. The gel administration shortened the coagulation time after bleeding from the tail incisions by 69.9 % from the original time. Conclusion:Our preliminary study showed that the gel formulation obtained from F. fomentarius is a potent hemostatic agent in a rat-bleeding model.