Abstract The European Convention on Human Rights, promulgated by the Council of Europe in 1950, is widely regarded as the world's most successful experiment in the trans-national judicial protection of human rights. The EU's much more recent judicial and political interest in human rights has also been widely welcomed. Yet, while the crisis currently afflicting the Convention system has not gone unnoticed, the same cannot equally be said of the difficulties presented by the increasing interpenetration of the two systems. Amongst the few who have shown some interest in these problems, the dominant view is that good will and common sense will provide adequate solutions. We disagree. Instead, we detect a gathering crisis which, unless properly analysed and effectively tackled, will only deepen as the EU's interest in human rights develops further. In our view, the problem is essentially conceptual and that, ultimately, it boils down to a much-neglected question, simple to state but not so easy to answer: is the trans-national protection of human rights in Europe a matter of individual, constitutional or institutional justice?