This research aimed to determinate ethanol in a distillate sample of Arenga pinnata. We have determined, by the means of spectrophotometer UV/VIS, ethanol contained by the distillation process of a series of samples. The results of these researches will analyse the ethanol contained in a distillate sample, qualitatively. Experiment method with 12 samples of Arenga pinnata series has been done. The samples found by varying day of the fermentation process and continued with the distillation process. Further, a distillate sample has been measured by UV-VIS Spectrophotometry. Wavelength 277 nm found as maximum wavelength with absorbance range (0.1 A-0.5 A). Samples in day 2nd to day 17th have these data. This means that a sample in day 2nd to day 17th of samples contained ethanol. Furthermore, the percentage of ethanol in a series of samples and the pharmacology effect of palm sugar as hypoglycaemic are still investigating in this research.