Batman #1 (Spring 1940): The First Appearance of the Joker and Catwoman
The answer in brief
One year after his debut in Detective Comics 27 in May 1939, the masked hero's phenomenal success led the publisher to give him a periodical in his own name. Bill Finger, Bob Kane, and the very young Jerry Robinson simultaneously revealed two immense creations: the Joker and Catwoman. These two figures, born in the same season, have since dominated the entire Gotham rogue's gallery.
🃏 Batman #1 (Spring 1940): The issue that gave the Dark Knight his two greatest figures
Some comic book issues change the history of pop culture. Batman #1, published in spring 1940, is one of them — and not just because it's the very first magazine entirely dedicated to the Dark Knight. This legendary issue offered the world, in a single release, the two most iconic characters in the entire Batman universe: the Joker and Catwoman. The vigilante's greatest enemy and greatest love, born on the same day, within the same pages. For this alone, Batman #1 is among the most important comics ever published. A deep dive into this foundational issue: its context, its revelations, and its colossal legacy.
📖 After Detective Comics #27: Batman gets his own title
A year earlier, in May 1939, Batman made a spectacular entrance in Detective Comics #27, the comic book where he was born. The success was immediate and resounding: the public demanded more and more adventures of Gotham's vigilante. Faced with this enthusiasm, the publisher made a logical and historic decision: to give Batman his own magazine, simply bearing his name. This is how Batman #1 was born in the spring of 1940.
This launch of a solo title was in itself a major event: at the time, few characters were deemed popular enough to carry a magazine on their own. Batman thus joined the very exclusive club of superhero stars, alongside Superman. But where the publisher saw a simple commercial extension, Bill Finger, Bob Kane, and young Jerry Robinson were going to deliver much more: an issue that would forever define the mythology of the Dark Knight.
🃏 The Joker's first appearance
This is the most resounding event of this issue: the birth of the Joker. The pale-faced, green-haired, demented criminal clown appears for the first time in Batman #1, and he kills in his very first adventure. Conceived from the image of a playing card joker and actor Conrad Veidt in The Man Who Laughs, the character immediately established himself as an antagonist of unprecedented darkness. A detail that has become legendary: the Joker was initially supposed to die at the end of this very first story, but an editor, understanding his potential, demanded that he be kept alive. A decision that changed the history of comics.
The Joker would become not only Batman's greatest enemy but one of the most iconic villains in all fiction. His dizzying psychology, explored in the portrait of the Joker's tortured mind, is rooted in this very first appearance. Everything that makes the character today — chaos, macabre humor, obsession with Batman — was already there, in embryonic form, in the spring of 1940.
🐾 Catwoman's first appearance
As if introducing the Joker to the world wasn't enough, Batman #1 also presents the Dark Knight's first great love and most fascinating rival: Catwoman. She doesn't yet appear under that name — she's simply dubbed "The Cat" — but the essence is there: an elegant, cunning, and irresistible jewel thief who outsmarts Batman with a mix of seduction and audacity. From this first encounter, the chemistry between the vigilante and the cat burglar is electric, laying the foundation for one of comic books' most enduring relationships.
Catwoman would become much more than a simple enemy: an elusive anti-heroine, a symbol of freedom, and a feminist figure ahead of her time, whose complete story is traced in the article on Catwoman: origin, evolution, and impact of a Gotham icon. That the Joker and Catwoman — shadow and temptation, hatred and love — were born in the same issue is almost an editorial miracle.
📚 What does the issue actually contain?
Batman #1 is a generous issue, composed of four distinct stories. In addition to the debuts of the Joker (who actually appears twice in the issue) and Catwoman, it includes a condensed version of Batman's origins, reminding the reader of the foundational murder of Bruce Wayne's parents — that Crime Alley tragedy that forged the vigilante, and whose complete story is told in how Bruce Wayne became Batman. The tone of the issue is still close to the early pulp detective stories, dark and direct, a far cry from the psychological depth of later eras.
This anthology format allowed for presenting multiple facets of the character and his nascent universe. One can feel a overflowing creative energy, that of a team inventing in real-time the codes of a mythology destined to last for over eighty years. Every page breathes the audacity of an era where everything was still to be written for the Dark Knight and his city, Gotham City.
🏛️ The Legacy: the issue that launched the villains' gallery
If Detective Comics #27 gave birth to Batman, it was Batman #1 that gave birth to his universe. By introducing the Joker and Catwoman consecutively, this issue laid the cornerstone of the greatest rogue's gallery in all comic books — this ensemble of iconic antagonists that today makes Gotham so rich, and which are gathered in the guide to Batman's enemies. Without Batman #1, there would be no rogues' gallery, and therefore no Batman as we know him.
It is also an extraordinarily valuable collector's item. Rare copies of this issue in good condition reach astronomical prices at auctions, trading for hundreds of thousands, even millions of dollars. To own Batman #1 is to possess a foundational fragment of 20th-century popular culture — a privilege reserved for a handful of wealthy collectors.
🦇 The issue that changed everything
Batman #1 is not just the first Dark Knight magazine: it's the issue that transformed a simple vigilante into an entire universe. In a single release, it gave Batman his sworn enemy and his great temptation, two characters without whom the entire saga would be unthinkable. The Joker and Catwoman, chaos and seduction, shadow and light — all of Gotham's dramatic balance was born here, in the spring of 1940. To place this gem among the other great works of the Dark Knight, the guide to all Batman comics by era traces this entire genealogy. And everything, absolutely everything, began to flourish in these few foundational pages.