The term "political prisoner" is used by persons or groups challenging the legitimacy of the detention of a prisoner. Supporters of the term define a political prisoner as someone who is imprisoned for his or her participation in political activity. If a political offense was not the official reason for detention, the term would imply that the detention was motivated by the prisoner's politics.


















Some understand the term political prisoner narrowly, equating it with the term prisoner of conscience (POC). Amnesty International campaigns for the release of prisoners of conscience, which include both political prisoners as well as those imprisoned for their religious or philosophical beliefs. To reduce controversy, and as a matter of principle, the organization's policy applies only to prisoners who have not committed or advocated violence. Thus, there are political prisoners who do not fit the narrower criteria for POCs.
In the parlance of many political movements that utilize armed resistance, guerrilla warfare, and other forms of political violence, a political prisoner includes people who are imprisoned because they are awaiting trial for, or have been convicted of, actions which states they oppose deem (accurately or otherwise) terrorism. These movements may consider the actions of political prisoners morally justified against some system of governance, may claim innocence, or have varying understandings of what types of violence are morally and ethically justified. For instance, French anarchist groups typically call the former members of Action Directe held in France political prisoners. While the French government deemed Action Directe illegal, the group fashioned itself as an urban guerilla movement, claiming a legitimate armed struggle. In this sense, "political prisoner" can be used to describe any politically active prisoner who is held in custody for a violent action which supporters deem ethically justified.