Article 26 of the Universal Declaration of Human Rights declares: "Everyone has the right to education." This implies that the right to education and training applies to all persons, including all persons in prison. This position is considered here from a philosophical point of view and it will receive some support. Yet it is not obvious that the position is correct, nor, if it is, how it is best explained. I will examine the basis for asserting a right to education on behalf of all prisoners, and consider what is required by way of its defence in the face of common objections. I illustrate how international conventions and principles express prisoners' right to education, and I look at how this right is defended by appeal to education as a means to an end and as a human right--required by respect for persons and their human dignity.