An incision wound is a wound that is intentionally made by a clean-cut using a sharp object. Betel leaf is a natural ingredient that helps the wound healing process because it has active ingredients such as saponins, tannins, flavonoids, essential oils, and alkaloids. The study aimed to determine the effect of betel leaf extract on the healing process of incision wounds in white rats. This study uses a true experimental research design conducted on white rats. Samples were taken by random sampling and divided into four groups, namely control group (KK) (n = 6), treatment group with a dose of 10% (P1) (n = 6), treatment group with a dose of 15% (P2) (n = 6) and treatment group with a dose of 20% (P3) ( n = 6). The mean of wound’s length in KK=0.78 cm, P1=0.67 cm, P2=0.57 cm, and P3=0.15. Based on the Kruskal Wallis test, p value=0.000(α0.05), there is a significant difference in the wound healing process between the control and treatment groups. Betel leaf contains active substances, namely flavonoids, alkaloids, saponins, tannins, and essential oils. The active substance causes the wound’s edges to close faster, so the wound heals faster.