Introduction: Surgical procedure were often done with incicion involved which could result in the damage of the tissues, stimulating the process of healing. Healing process is dynamic and consists of several phases; inflammation, proliferation, and maturation. Fibroblast cell started to flourish in the proliferation phase. One of the herbal plants that played an important role in healing process is Aloe vera. The nutrition of Aloe vera helped the cells regeneration process, which can be used as anti-bacteria, anti-fungus, and anti-inflammation. This research aimed to identify the effectivity of Aloe vera extract to the number of fibroblast cells in the incised healing process of Cavia cobaya. Methods: This research used 9 adult male Cavia cobaya. Two incised wounds were made vertically in the back of each Cavia cobaya. The first incised wound then was treated with 75% aloe vera extract and the sample was used as test group. Meanwhile the second wound was treated with aquades (distilled water) as control group. The treatment was given for 4 days and in the fifth day all subjects were decapitated and were brought to histology examination to count the number of fibroblast cell. The whole process was then analysed by independent t-test. Result: There was significant difference in the number of fibroblast cell of test group and control group (p<0.05). Conclusion: It can be concluded that 75% of aloe vera extract can increase the number of fibroblast cell in the healing process of Cavia cobaya incised wound.