The goal of creating the Human OncoBiome Database (HOBD) is to provide the scientific community with comprehensive curated information on the bacterial species present in the human cancer microbiota. In HOBD we have compiled the information of different cancers (Oral cancer, Liver cancer, Breast Cancer and Colorectal cancer). Our Database HOBD is different from Human Oral Microbiome Database (HOBD) as the latter provides the comprehensive information about species that are present in the human oral cavity while the former is with regard to the species that are present in the various human cancers. The HOBD site will offer easy to use tools for viewing all publically available human Cancer microbiota.