Squid sacs are common byproducts of the process. It mainly contains melanin and protein-peptide complex. Squid ink has antitumor, antioxidative, antimicrobial, hematopoietic and antiinflammatory activities. We use squid sac as material. Ink separated from ink sac, and ink tofu was prepared by the property ratio. The aim of this research is to reduce wastes by establishing the ink tofu from the marine material.