Wei Jingsheng (Chinese: 魏京生; born 20 May 1950) is a Chinese human rights activist and dissident. He is best known for his involvement in the Chinese democracy movement. He is most prominent for having authored the essay "The Fifth Modernization", which was posted on the Democracy Wall in Beijing in 1978. As punishment from the government for writing his manifesto, Wei was arrested and convicted of "counter-revolutionary" activities, and was detained as a political prisoner from 1979 to 1993. Briefly released in 1993, Wei continued to engage in his dissident activities by speaking to visiting journalists, and as punishment, he was imprisoned again from 1994 to 1997, making it a total of 18 years he has spent in various prisons. He was deported to the United States of America on 16 November 1997, on medical parole. Still a Chinese citizen, in 1998 Wei established the Wei Jingsheng Foundation in New York City (now based in Washington, D.C.) whose stated aim is to work to improve human rights and advocate democratisation in China.

Wei was the oldest of four children, brought up by Chinese Communist Party cadres. In 1966, Wei joined the Red Guards as a 16-year-old student during the Cultural Revolution. He lived in remote rural areas in Northern China and was able to speak with peasant farmers about the widespread famines that had occurred a few years before, during the Great Leap Forward. He uncovered the role that the communist government under Mao Zedong played in causing the famines, and it forced Wei to start questioning the nature of the system under which he lived. Wei would later write about this period: "I felt as if I had suddenly awakened from a long dream, but everyone around me was still plunged in darkness." In 1973, he began working as an electrician at the Beijing Zoo.

Wei did not publicly voice his feelings until 1978, when he decided to take part in the newly emerging Democracy Wall movement which was then taking place in Beijing. On 5 December 1978, he posted an essay which he authored on the wall. Entitled "The Fifth Modernization," Wei's essay was a response to paramount leader Deng Xiaoping's essay, the Four Modernizations. The basic theme of Wei's essay is that democracy should also be a modernization goal for China along with the other four modernizations which were proposed by Deng (industry, agriculture, science and technology, and national defense).

Wei signed the essay with his real name and address. The essay immediately caused a stir because of its boldness and because its author was not anonymous. It was also the only essay which addressed Deng Xiaoping by name, and it was also the only essay which referred to him as a dictator.

Of course, internal problems cannot be solved overnight but must be constantly addressed as part of a long-term process. Mistakes and shortcomings will be inevitable, but these are for us to worry about. This is infinitely better than facing abusive overlords against whom there is no redress. Those who worry that democracy will lead to anarchy and chaos are just like those who, following the overthrow of the Qing dynasty, worried that without an emperor the country would fall into chaos. Their decision was to patiently suffer oppression because they feared that without the weight of oppression, their spines might completely collapse! To such people, I would like to say, with all due respect: We want to be the masters of our own destiny. We need no gods or emperors and we don't believe in saviors of any kind...we do not want to serve as mere tools of dictators with personal ambitions for carrying out modernization. We want to modernize the lives of the people. Democracy, freedom, and happiness for all are our sole objectives.

Wei differed from the mainstream of the Democracy Wall movement (which believed that the primary conflict was between a bureaucratic class and the people) because unlike the majority of movement participants, he argued that a totalitarian political system was the source of the people's grievances. He was one of the few activists who explicitly argued against Marxism and the leadership of a Marxist party.

Wei is also known for his editorial work in the short-lived magazine Explorations (探索) in 1979. He published a letter under his name in March 1979 in which he denounced the inhuman conditions which existed in Beijing's Qincheng Prison, where the 10th Panchen Lama was imprisoned.

His dissident writings eventually led him to be tried and imprisoned. Orville Schell, a writer and academic who specializes in China, wrote: