Lichfield and Burntwood’s MP said he could not look himself in the mirror if he voted in favour of Theresa May’s Brexit deal.
Conservative representative Michael Fabricant says he intends to go against his own Government when the proposal comes before the House of Commons.
The long-standing MP said leaving the EU with the current plan would create “an overwhelming sense of betrayal”.
Mr Fabricant made his comments in a column for the Telegraph.
He said: “I rarely vote against my Government, but conscience and the long-term future of my nation, and yes, my party too, take precedence.
“I could not look myself in the mirror if I supported this deal.”