Speaking on Radio 4's The World at One, Conservative backbencher Eleanor Laing spoke of "despair" among MPs in the party.
She said: "I'm afraid that there is a very large number of Members of Parliament on the Conservative benches now who come back from their constituencies every weekend in despair about the number of people who are resigning from the Party."
Asked what she thought Conservative voters were feeling, she said: "They feel hurt and they feel left out. They're told that they're old-fashioned and they think that they don't matter and that what they stand for, and what they believe in, doesn't matter.
"Those people who for decades have put their faith in the Conservative Party."
More top news
British Defence Secretary Michael Fallon is in the Middle East to gather support for the international military campaign against IS.
Beware! The super-sized spiders are coming. And they seem to be everywhere! But why? A warning - this story is not for the faint hearted!
Homes around London are being invaded by spiders with rising temperatures helping the creepy crawlies grow bigger than usual.