South Africa has some of the highest rates of rape in the world. Activists have drawn attention to the devastating effect this has on women and children. However, insufficient attention has been paid to rape – predominantly of men – in prisons. This article aims to educate gender activists about the phenomenon of prison rape in the context of South Africa. It hopes to make the case that prison rape reflects and reinforces rape culture in South Africa (and elsewhere). In so doing, it aims to galvanise action to prevent prison rape and all forms of rape.