Disambig.png This article is about the large odd mushroom. For the smaller mushroom, see Odd Mushroom (Thin).

Odd Mushroom is a passive item.


  • Gives Isaac one empty Heart container.
  • Dlc nr indicator.png +0.3 damage.
  • Dlc r indicator.png +1 damage.
  • Dlc nr indicator.png +0.25 range.
  • Dlc r indicator.png +0.38 range.
  • +0.5 tear height.
  • Dlc nr indicator.png -0.1 speed.
  • Dlc r indicator.png -0.2 speed.
  • Makes Isaac's head larger, which on its own is only a visual effect.
    • If taken when Isaac is smaller than the default, this Mushroom also increases his hitbox slightly.
  • Dlc a indicator.png This item belongs to the Fun Guy set. Collecting three items from this set will transform Isaac into a walking mushroom.


  • There are two collectible items in the game named Odd Mushroom; you can tell them apart from the sprites.


  • Dlc nr indicator.png Collectible The Virus icon.png The Virus: The speed down from the Virus does not stack with the Odd Mushroom; if both are collected, only a total of -0.1 applies.

In-game Footage


PC CH0T JNLO (First Secret Room to the left of the Treasure Room)

PC J1S1 MKKL (First floor Treasure Room)

PC 1SJM PBG6 (Treasure Room adjacent to spawn)

PC Dlc a indicator.png STDX QSC8 (Two items in Treasure Room adjacent to spawn - Mushroom is on the right)

PS4 BPR1 KMWS (Treasure Room adjacent to spawn)

PC P14Y 8CAT (First floor Treasure Eoom) Mac Dlc a indicator.png TMK3 C3JN ( NormalIndicator.png Treasure Room two rooms up of spawn; HardIndicator.png Treasure Room to the right of spawn)

SmallIsaac.png The Binding of Isaac: Rebirth SmallIsaac.png
MainPageAchievements.png Achievements MainPageAttributes.png Attributes MainPageBosses.png Bosses TarotCard.png Cards and Runes MainPageChallenges.png Challenges MainPageChapters.png Chapters
Character Isaac appearance.png Characters MainPageBabies.png Co-op MainPageItems Small.png Items Collectible Isaac's Tears icon.png Item pools MainPageMonsters.png Monsters MainPageObjects.png Objects
Red Heart.png Pickups BlueBlue.png Pills MainPageRooms.png Rooms MainPageSeeds2.png Seeds Transformation Guppy appearance.png Transformations Trinket The Left Hand icon.png Trinkets
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