Diabetes mellitus is a metabolic disorder disease characterized by increased blood glucose levels due to impaired insulin secretion or increased insulin resistance. The study was performed to investigate the blood glucose lowering effect of Musa acuminata Colla fruit peel (MACFP) ethanol extract in experimentally induced diabetic rats. 25 rats were divided into five groups, i.e negative control group (0.5% NaCMC), positive control group (glibenclamide), and treatment group of MACFP ethanol extract with dose 250, 375, and 500 mg/kg body weight (mg/kg BW). The blood sample was taken from the lateral vein of the tail, and then blood glucose level was observed on 0, 30, 60, 90, and 120 minutes. The results provide information that MACFP ethanol extract with dose 250, 375, and 500 mg/kg BW have the same effect with a positive control (glibenclamide) in lowering blood glucose level on diabetic rats (p>0,05). MACFP ethanol extract with dose 500 mg/kg BW had the highest percentage of decrease in blood glucose level (42,62%), followed by doses 375 mg/kg BW (37,26%) and 250 mg/kg BW (24,12%).