Boss Room is a room in The Binding of Isaac.

The Boss Room is the final room of every floor, featuring a fight against one of many bosses.

Upon defeating the boss, an item from the Boss item pool is spawned, some hearts (depending on difficulty), and a trap door leading to the next level.

A Devil Room or Angel Room may appear upon defeating the boss.

Some room layouts known as "Double Trouble" feature 2 bosses and a larger boss room.

Certain bosses are always fought inside a large boss room.

If the floor is affected by Curse of the Labyrinth!, two consecutive Boss Rooms will be generated, with only the second one offering a trap door to the next level, and an Angel/Devil Room.

The Boss Room cannot be blasted through in order to escape.

The eyes of the skull on the door will flash until the boss has been defeated.

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

The Boss Room is associated with the Boss 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.