Black Market is a room in The Binding of Isaac.

The Black Market is a 2-room-wide hidden shop that can be accessed via a passage inside a Crawl Space.

The left side of the Black Market contains a door leading back to the entrance and a trap door leading to the next floor.

The center contains several items from the Shop item pool that are sold in exchange for heart containers, similar to a Devil Deal, although this does not count as making a deal with the devil.

The Black Market also includes a bunch of Shopkeepers, beggars, and sometimes various pickups.

The Black Market can also be accessed via Telepills, Undefined, and Cursed Penny. If entered this way, there will be no door leading back, and Isaac will be forced to go to the next floor.

Only one Black Market may exist per floor. If multiple entrances are found, they will both lead to the same room.

This room is not part of the playable area and exists outside of the map's boundaries.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this room for the previous Repentance version, check this page instead.

The Black Market is associated with the Shop item pool. Items that spawn in this room will be selected from the associated item pool.

• Check out the room description on the external Isaac Wiki.