Johann Michael Vansleb (1 November 1635 – 1679) was a German theologian, linguist and Egypt traveller.
He converted to Catholicism and was a member of the Dominican Order from 1666.
(Depending on the language of publication, his name is spelled a number of different ways including: Wansleben, Vansleben, Vanslebio, Vanslebius, Vanslep, Wanslebio, Wanslebius, J.