Esaias Fleischer (25 October 1633 – 5 February 1697) was a Danish priest.
He was influenced by Niels Svendsen Kronich, but because of this he deviated too much from the state church, and was sentenced to lose his academic rights in 1655.
He returned to Denmark in 1664, where his reputation had been restored, partly because of his connection to Hans Nansen.
[1] In 1665 Fleischer took his academic degree, and was hired as vicar in the Church of the Holy Ghost, Copenhagen.
He was fired by bishop Hans Bagger, who in turn was ordered by the King, in 1679 for protesting the peace arrangements of the Scanian War.