Binding of Isaac: Rebirth Wiki

Mom's Key is a passive item.


  • Gives Isaac two Key Keys.
  • If a non- Red Chest Red Chest spawns hearts, coins, Bomb Bombs and/or Key Keys, causes the chest to spawn a second group of said pickups, effectively doubling the average pickup yield.
  • Added in Afterbirth This item belongs to the Yes Mother? set. Collecting three items from this set will transform Isaac into his mother.


  • Mom's Key cannot change the contents of a chest; it will only cause it to spawn extra pickups.
  • All other chest rewards (such as pills, cards, items, etc.) will not cause the chest to spawn additional pickups.
  • Added in Repentance Does not affect Old Chest Old Chests.


  • Mom's Key Mom's Key: Does not further increase the amount of pickups spawned when multiple copies of the item are acquired.

In-game Footage[]


  • Mom's Key is the first item, by ID number, that was not carried over from Wrath of the Lamb.
  • The appearance of Mom's Key is a reference to Bowser's boss key in Super Mario 64 as well as the Boss Key in various Legend of Zelda games.
  • Removed in Repentance Prior to Repentance, this item's description was "Less is now more +2 keys".