Batman / Batman Joker

How Did Joker Infect Batman?

The Joker is one of the most iconic villains in the Batman universe. His unpredictable nature and twisted sense of humor make him a formidable foe for the Dark Knight.

But how did he manage to infect Batman? Let’s take a closer look.

The Origin of Joker

Before we dive into how Joker infected Batman, let’s first explore his origin story. The Joker’s true identity is unknown, but it’s believed that he was once a failed comedian who turned to a life of crime after a series of unfortunate events. He fell into a vat of chemicals during a robbery at Ace Chemicals, which permanently disfigured him and drove him insane.

The Laughing Gas

Joker’s signature weapon is his “Laughing Gas,” which induces uncontrollable fits of laughter in its victims. But how did he infect Batman with it?

It happened during the “Death of the Family” storyline, where Joker cut off his own face and disappeared for a year. When he returned, he had a plan to prove to Batman that their relationship was special by Targeting his closest allies – Robin, Nightwing, Batgirl, Red Hood, and Alfred.

The Infection

In one issue of the storyline, Batman confronts Joker in an abandoned theater. There, he discovers that Joker has been dosing his victims with a toxin that makes them laugh uncontrollably before killing them. When Batman tries to stop him, Joker stabs him with an infected blade.

The toxin in the blade infects Batman with the same laughing gas that Joker has been using on his other victims. As a result, Batman begins to hallucinate and see visions of all the people who have died because of him.

The Aftermath

After being infected by Joker’s laughing gas, Batman struggles to come to terms with his guilt over the deaths caused by his actions. He is haunted by the Joker’s words and actions, which push him to the brink of insanity.

But in the end, Batman is able to overcome his guilt and defeat Joker once again. He realizes that he cannot let his guilt consume him, and that he must continue to fight for justice no matter what.


In conclusion, Joker infected Batman with his laughing gas during the “Death of the Family” storyline. The infection forced Batman to confront his guilt over his past actions and ultimately pushed him to overcome it. The Joker will always be a dangerous opponent for Batman, but their rivalry has helped shape both characters into iconic figures in comic book history.