The Revd Martin Junge said such a move would raise "theological questions" and ecumenical dangers and "send a wrong signal" to ecumenically-minded Lutheran Churches.
He made his comments in an 18 January statement after Archbishop Gerhard Müller, head of the Congregation for the Doctrine of the Faith, raised the possibility of a so-called "Lutheran ordinariate" similar to that for Anglicans at an 11 January book presentation in Rome.