Owing to global environmental concerns, sustainable industrial processes have become a topic of signi cant importance in various elds. Chestnut shells are byproducts of agricultural and food industries; however, they include various health-bene cial compounds such as polyphenols and avonoids. In this study, the feasibility of using chestnut shell extract as a natural functional agent for textile nishing processes was investigated. The chestnut shell extract was prepared by boiling the inner and outer shells of chestnut in distilled water for 4 h. Subsequently, the extract was ltered, centrifuged, concentrated, and nally dried into powder form using a freeze dryer. The extract was then dissolved in distilled water at different concentrations and applied to cotton fabrics through a pad-dry-cure process.The nished cotton fabrics were investigated by scanning electron microscope, Fourier-transform infrared spectroscopy, etc. In addition, the antibacterial and antioxidant properties of the nished cotton fabrics were examined as functional properties. The results showed that the cotton fabrics nished by chestnut shell extract exhibited signi cant antibacterial, antioxidant, and deodorant properties when the concentration of the chestnut shell extract was above 10 wt% in the nishing bath.