Binding of Isaac: Rebirth Wiki
Binding of Isaac: Rebirth Wiki

Chub is a boss that can appear in Caves Caves and the Added in Afterbirth Flooded Caves Flooded Caves.


Chub moves randomly around the room in cardinal directions and can perform the following attacks:

  • Charges at Isaac whenever he lines up with one of her cardinal directions.
    • Chub eats any Bombs dropped in her path; stunning her for a moment before dealing considerable damage.
  • Spawns a 1-2 Charger up to a maximum of 5 (occasionally 6 if she spawns 2 while there are 4 alive).
    • Chub's charge attack can damage and kill any Chargers.

Chub deals a whole heart of contact damage.

Champion Versions Needs to be unlocked[]

  • Cyan: 15% larger and slower than normal, with 25% more HP (437.5). Spawns Black-coloured Boils instead of Chargers. Despite the different color, they behave exactly like normal Boils.
  • Orange: 15% smaller and faster than normal, with 15% less HP (297.5). Spawns Spitties instead of Chargers.



  • Chub is often paired with Chargers in the boss room.
  • When using 15►Dr. Fetus Dr. Fetus' bomb combined with a shot type that passes through enemies, Chub will not eat the bomb.
  • Each segment of Chub can be individually damaged, so a single piercing tear could hit Chub multiple times.
    • Added in Repentance Piercing shots no longer damage segmented enemies multiple times per attack.
  • Chub will eat Troll Bombs (such as those set by other bosses) just like bombs dropped by Isaac.
  • 15►Best Friend Best Friend can damage Chub if eaten, similar to a bomb.


  • Chub appeared in the original Binding of Isaac.
    • Sometimes, in the original game, Chub would spawn with only two segments, preventing her from spawning anything. This can also happen in Repentance.
  • Carrion Queen is the posthumous version of her, and C.H.A.D. is the alternate version.
  • She is the boss version of the Chargers.
  • Chub is one of four bosses to have its posthumous version in the same chapter, the other cases being Gemini having Blighted Ovum in chapter 1, Polycephalus having Added in Afterbirth The Stain in chapter 2 and Added in Repentance Tuff Twins having Added in Repentance The Shell in Chapter 2.5.
    • However, Chub doesn't appear in the same environment as Carrion Queen, who appears in Catacombs Catacombs while Chub appears in The Caves and the Added in Afterbirth Flooded Caves.
  • Chub is confirmed to be female.
  • Chub may also be a reference to the Dodongos from The Legend of Zelda, which Link had to toss bombs into their mouths to kill. This is supported by the Rules Card's display of "CHUB DISLIKES SMOKE", a reference to "DODONGO DISLIKES SMOKE" from the original Legend of Zelda.
  • Added in Afterbirth † The Matriarch is a boss from Booster Pack #5 that is simultaneously based of Chub, Fistula, and Fistuloid. When at low HP, she will split into Chub.
    • Unlike the usual pattern, if the Chub from The Matriarch eats a bomb, she'll spit it back at the player.
  • Chub is one of the four bosses that can be spawned by It Lives, the other three being Fistula (as of Repentance), Polycephalus and Teratoma.
  • Added in Afterbirth † Prior to Booster Pack #5, Chub could spawn Drowned Chargers if she was fought in the Added in Afterbirth Flooded Caves. This also applies to Added in Afterbirth The Stain.


Bug Bug! Removed in Afterbirth † If Chub is killed while frozen by Mom's Contacts, only the part to receive the last shot will die.
Bug Bug! Added in Repentance Her eating rockets from Added in Repentance15►Rocket in a Jar Rocket in a Jar causes the game to crash.

Bosses Boss Monstro.png
Chapter 1
Stage Basement icon.pngStage Cellar icon.pngStage Burning Basement icon.png
GeminiStevenBlighted OvumDingleThe Duke of FliesFamineGurglingsThe HauntLarry Jr.MonstroPinWidowThe FallenThe Headless Horseman
DangleLittle HornRag ManTurdlings
Baby Plum
Chapter 1.5
Stage Downpour icon.pngStage Dross icon.png
Lil BlubWormwoodThe RainmakerMin-MinClogColostomiaTurdlet
Chapter 2
Stage Caves icon.pngStage Catacombs icon.pngStage Flooded Caves icon.png
FistulaChubC.H.A.D.Carrion QueenDark OneGurdyGurdy Jr.The HollowThe HuskMega FattyMega MawPeepPestilencePolycephalusThe WretchedThe FallenThe Headless Horseman
The ForsakenThe FrailThe Stain
Big HornRag Mega
Chapter 2.5
Stage Mines icon.pngStage Ashpit icon.png
Reap CreepTuff TwinsHornfelGreat GideonSingeThe ShellThe Pile
Chapter 3
Stage Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
The AdversaryThe BloatThe CageThe GateMonstro IIGishLokiMask of InfamyWarThe FallenThe Headless HorsemanMom
Sisters Vis
Reap CreepThe Pile
Chapter 3.5
Stage Mausoleum icon.pngStage Gehenna icon.png
The SirenThe HereticThe VisageThe Horny BoysMomMom's Heart
Chapter 4
Stage Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
BlastocystThe BloatConquestDaddy Long LegsTriachnidDeathLokiiMama GurdyMr. FredScolexTeratomaThe FallenThe Headless HorsemanMom's HeartIt Lives
Sisters VisThe Matriarch
Stage Corpse icon.png
ChimeraThe ScourgeRotgutMother
Chapter 5
Stage Sheol icon.pngStage Cathedral icon.png
Chapter 6
Stage Dark Room icon.pngStage Chest icon.png
???The LambMega Satan
The Void
Stage The Void icon.png
Stage Home icon.png
DogmaThe BeastUltra DeathUltra FamineUltra PestilenceUltra War
Greed Mode
Ultra Greed
Ultra Greed
Ultra Greedier
The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth
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