Our poll of GPs' voting intentions reveals just 15% will vote Labour and only 17% prefer Labour's health policies.
The survey of 314 GPs found 53% plan to vote Conservative this year, compared with just 24% in 1997.
GPs are unhappy with many of Labour's flagship policies, with 59% condemning practice-based commissioning as a ‘failure' and 78% opposed to plans to scrap practice boundaries.
With the election campaign under way and focused on health, nearly 6% of GPs remain undecided who they will vote for.
A previous GP poll found that in 1997 the Conservatives were seen as having the worst health policy of the major parties.
The majority of GPs' comments suggest anger at Labour and concern with politics in general, rather than genuine support for the Conservatives.
Less than a third (30%) of GPs support the Conservatives' plans to hand responsibility for commissioning budgets to GPs.
In an exclusive interview with GP this week, health minister Mike O'Brien admitted GPs had been put under pressure by Labour in order to justify huge investment into the NHS and the 2004 GP contract.
Meanwhile, Dr Laurence Buckman, chairman of the BMA's GP committee, said Labour was now seen by many GPs as ‘the enemy of the NHS'.
The imposition of so-called Darzi centres ‘has to top the list' of Labour policies most disliked by GPs, said Dr Buckman.
Editor's blog: Why is Labour so disconnected with GPs on the NHS?