Johnson faced the vote after a growing number of MPs in his Conservative Party questioned the British leader's authority over what has been dubbed the "partygate" scandal.
The prime minister has been under increasing pressure after he and staff held alcohol-fuelled parties in his Downing Street office and residence when Britain was under strict lockdowns due to Covid-19.
The result was announced by Sir Graham Brady, chairman of the 1922 Committee, which represents backbench Conservative MPs.
