The Cannabis Act (Cannabisgesetz) is a German law passed by the Bundestag in February 2024 and the Bundesrat in March 2024 that legalised the possession, cultivation, and use of cannabis by adults aged 18 and over. The law took effect on 1 April 2024, allowing adults to possess up to 25 grams of cannabis in public and up to 50 grams of dried cannabis at home, as well as to cultivate up to three plants for personal use. From 1 July 2024, adult-only non-profit cannabis social clubs with a maximum of 500 members also became legal.

Entwurf eines Cannabiskontrollgesetzes (CannKG; "Draft of a cannabis control law") was a bill proposed in 2015 that would remove cannabis from the list of scheduled drugs in Germany's Narcotic Drugs Act. The issue was proposed by Alliance 90/The Greens (the German Green Party) on 20 March 2015. It would regulate cannabis in a manner similar to alcohol, with adults 18 years old permitted to buy and possess up to 30 grams in regulated stores.

A new regulatory framework that would legalise cannabis in Germany was brought out with an Eckpunktepapier ("cornerstone paper", or framework paper), introduced on 26 October 2022 by Minister of Health and member of the Bundestag, Karl Lauterbach, who is a physician and epidemiologist trained in the United States and Germany.

The 2022 deregulation proposal was leaked around 19 October 2022.

In March 2023, the former health minister, Karl Lauterbach, reported a positive reaction from European Commission on the plan, and intended to bring a bill forward soon.

The finalised bill received approval of the governing parties on 2 February 2024. The Bundestag passed the bill on 23 February 2024, and the Bundesrat approved it on 22 March, with the national legalisation to follow by 1 April. The final bill legislates that adults in Germany (those aged 18 and over) can legally use cannabis, possess and carry up to 25 grams (7⁄8 oz) of cannabis for personal possession in public and have up to 50 grams (1+3⁄4 oz) of dried cannabis at home. The legislation states that adults have a maximum purchase limit of 25 grams of cannabis a day and a monthly maximum purchase limit of 50 grams of cannabis. Each individual adult in Germany can also have up to three of their own cannabis plants at home. From 1 July 2024, adult residents of Germany will be allowed to join adult-only non-profit cannabis social clubs in Germany, with a maximum membership of 500. These cannabis social clubs will require permits. Consumption of cannabis inside and in a radius of less of 100 m from the entrances of schools, kindergartens, public playgrounds, public sports facilities, as well as in presence of minors and, between 7 am and 8 pm, in pedestrian zones in city centers will not be allowed.

Details of a leaked version of a new scaled-back plan were published by German newspaper Die Zeit in late March. The new plan would have experimental controlled legalization in sub-national areas.

The new plan was officially announced on 12 April. Provisions included legal possession of up to 25 grams of cannabis, and home- or club-grown cannabis, but did not allow large-scale commercial production and sale of the plant.