Asia Bibi has been on death row since November 2010 after she was found guilty of making derogatory remarks about the Prophet Mohammed during an argument with a Muslim woman.
A high court in the eastern city of Lahore confirmed the death sentence last month, dashing hopes it might be commuted to a jail term.
"We are convinced that Asia will only be saved from being hanged if the venerable President (Mamnoon) Hussain grants her a pardon. No one should be killed for drinking a glass of water," husband Ashiq Masih wrote in an open letter dated November 17 and published by the New York Times.
Masih added his wife was not guilty of blasphemy.
The plea for being allowed to move to Paris comes days after the mayor of the city Anne Hidalgo requested President Hussain to grant her a pardon.
Senior opposition leader Bruno Retailleau yesterday asked French President Francois Hollande to intervene in the case.
Blasphemy is a hugely sensitive issue in the majority Muslim country, with even unproven allegations often prompting mob violence.
He visits his wife once a month, making a five and a half hour journey to her jail in Multan in southern Punjab.
The allegations against Bibi date back to June 2009, when she was labouring in a field and a row broke out with some Muslim women she was working with.
She was asked to fetch water, but the Muslim women objected, saying that as a non-Muslim she was unfit to touch the water bowl.
