The IMGD (Insect Mitochondrial Genome Database; http://www.imgd.org) archives 113,985 partially sequenced hexapod mitochondrial genome entries (PMEs), providing various information such as the number of mitochondrial genes or taxonomic information. The 113,985 PMEs show most PCGs including much larger number of PMEs than rRNAs and tRNAs, and the family, genus, and species information are focused on five orders, Coleoptera, Diptera, Lepidoptera, Hymenoptera, and Hemiptera in 31 hexapoda orders. The alignment of 58,238 COI gene entries shows discordance in fragment length and portion, resulting DNA barcode using 5′-region cannot be applied for all COI gene entries overall hexapod orders.