Black Organization (黒の組織, Kuro no Soshiki), mostly shorted as BO, is a secret criminal organization and the main antagonists of the Detective Conan series. The organization is known for committing numerous crimes, from blackmail to robberies to assassinations. The code names of each member of the organization is based on alcoholic beverages. The organization is also the main source of the APTX 4869 which was used against Shinichi and used by Shiho Miyano on herself when she escaped from the organization.

The boss of the organization is unseen and unknown, he only contacts his members through text messages. The boss phone number follows the tune of the children song Nanatsu no Ko (七つの子; Literally meaning "Seven Children") which is known to be as; #969#6261.