Presenter Ben Brown was interviewing BBC Assistant Political Editor Norman Smith to get a reaction to Labour's manifesto launch in Bradford today.
Many viewers were shocked by Brown's actions, believing he touched her boob in the process.
After he moved her, the reporter receives a whack on the arm from the woman before she storms off.
The clip was shared widely on social media with viewers stunned by what they saw.
"Holy s***, he grabbed her!" wrote one LiveLeak user.
But as they discussed opposition leader Jeremy Corbyn's potential "uncertainty about benefits", a woman wearing a leopard-print top and sunglasses wandered in between them.
The woman smiles to the camera, gives it a thumbs up and interrupts the discussion by saying: "Absolutely fantastic."
But keen to get her away and continue his interview, Brown stretched out his right hand to push the woman to the side.
A Twitter user commented: "Did he just do what I think he did? Bloody hell!"
And a third added: "My guess is the guy grabbed the boob by half-accident."
Ben Brown took to Twitter to respond to the outcry, writing: "Unfortunate interruption of broadcast in Bradford - just tried to minimise disruption but v tricky live on air - completely unintentional."
סרטונים קשורים (Viewers stunned as BBC reporter 'grabs boob' of woman live on TV)