Edible insects are not only good food ingredients for people, but also open the possibility of functional food and pharmaceutical raw materials. This study investigated the production of chitin-oligosaccharide and chitosan-oligosaccharide using edible insect, Tenebrio molitor (Tm). Chitin of Tm larvae was prepared using demineralization (2 N HCl, room temp., 3 h), deproteinization [5% NaOH (w/w) for 3.5 h at 70°C], and decolorization (3% H2O2 for 1.5 h at 80°C). Chitosan of Tm larvae was prepared by Tm chitin deacetylation at 50% NaOH (w/w) for 5 h at 105°C. The chitin of Tm yielded 50% chitosan, and the final extraction yield of chitin and chitosan from dried Tm larvae was 6.82% and 3.75%, respectively. Chitin-oligosaccharide and chitosan-oligosaccharide of Tm larvae were prepared via acid hydrolysis using 5.0 g of both Tm chitin and Tm chitosan. Finally, 2.12 g chitin-oligosaccharide of Tm larvae was obtained through acid hydrolysis (con. HCl 100 mL for 4 h at 40°C). Chitosan-oligosaccharide (2.5 g) of Tm larvae was produced via acid hydrolysis (con. HCl 50 mL for 1 h at 81°C) and purification. These results indicate that the industrial applicability of Tm chitin-oligosaccharide and chitosan-oligosaccharide is viable in the field of health supplements, as a large amount of these oligosaccharides can be obtained from edible insect, Tm larvae.