Gintama (銀魂; lit. 'Silver Soul') is a Japanese manga series written and illustrated by Hideaki Sorachi. It was serialized in Shueisha's shōnen manga magazine Weekly Shōnen Jump from December 2003 to September 2018, later in Jump Giga from December 2018 to February 2019, and finished on the Gintama app, where it ran from May to June 2019. Its chapters were collected in 77 tankōbon volumes. Set in Edo, which has been conquered by aliens named Amanto, the plot follows samurai Gintoki Sakata, who works as a freelancer in his self-established store, "Yorozuya", alongside his friends Shinpachi Shimura and Kagura, offering a wide range of services to handle various tasks and odd jobs. Sorachi added the science fiction setting to develop characters to his liking after his editor suggested doing a historical series.

The series was adapted into an original video animation (OVA) by Sunrise, which was featured at the Jump Festa 2006 Anime Tour in 2005. This was followed by a full 367-episode anime television series, which debuted in April 2006 on TV Tokyo, and finished in October 2018. The storyline of the series was concluded in the film Gintama: The Very Final, which was released in January 2021. Two other films were released in April 2010 and July 2013, respectively. Besides the anime series, there have been various light novels and video games based on Gintama. A live-action film adaptation of the same name was released in July 2017 in Japan by Warner Bros. Pictures.

The manga has been licensed by Viz Media in North America. In addition to publishing the individual volumes of the series, Viz Media serialized its first chapters in its Shonen Jump manga anthology. It debuted in the January 2007 issue and was serialized at a rate of one chapter a month. Sentai Filmworks initially licensed the series. The website Crunchyroll purchased the anime's streaming rights and home video rights.

In Japan, the Gintama manga has been popular, with over 73 million copies in circulation by November 2024, making it one of the best-selling manga series. The anime and its DVDs have been featured, at various times, in the Top Ten rankings of their respective media, while TV Tokyo has announced that the first Gintama anime was responsible for high sales overseas along with the anime adaptation from Naruto. Publications for manga, anime, and others have commented on the Gintama manga. Positive responses have focused on the comedy and characters from the series, as well as its overarching plot and action choreography.

The story is set in an alternate-history late-Edo period, where humanity is attacked by aliens called "Amanto" (天人; "Sky People"). Edo Japan's samurai fight to defend Earth, but the shogun cowardly surrenders when he realizes the aliens' power. He agrees to an unequal contract with the aliens, ceding power to them, and also places a ban on carrying swords in public and allows the invaders to enter the country. The samurai's swords are confiscated and the Tokugawa bakufu (shogunate) becomes a puppet government.

The series focuses on an eccentric samurai, Gintoki Sakata who works as an odd-jobs freelancer. He helps a teenager named Shinpachi Shimura save his sister Tae from an Amanto group that wants to send her to a brothel. Impressed by Gintoki, Shinpachi becomes his freelance apprentice to pay the bills and learn more about the enigmatic samurai. When the pair rescues a teenage alien girl with super-strength, Kagura, from a Yakuza group, they accept her into their odd-jobs freelancing business, and the three become known as "Yorozuya" (万事屋; 'Store of 10,000 business' or 'We do everything').

While working, they regularly encounter the Shinsengumi police force, who often ally with Gintoki when work involves dangerous criminals. The trio also meets Gintoki's former comrades from the Amanto invasion, including the revolutionary Kotaro Katsura who is friendly toward them despite his terrorist activities against the alien-controlled government.

The story is a balance between episodic and shorter arc based plotlines that resolve quickly, and a rich background plot that develops from its beginning to end. For example, Gintoki's former comrade Shinsuke Takasugi is a major antagonist who regards Gintoki and his other former comrades as enemies and seeks to destroy the shogunate. Over time, Takasugi gains allies, including Kagura's brother Kamui, and the elite fighting unit Mimawarigumi to prepare for his large-scale coup d'état. After the true antagonist—the immortal Utsuro—is introduced, Gintoki works with both friends and enemies to stop Utsuro from destroying the Earth.