The Cadeby Main Pit Disaster was a coal mining accident on 9 July 1912 which occurred at Cadeby Main Colliery in Cadeby, West Riding of Yorkshire, England, killing 91 men. Early in the morning of 9 July an explosion in the south-west part of the Cadeby Main pit killed 35 men, with three more dying later due to their injuries. Later in the same day, after a rescue party was sent below ground, another explosion occurred, killing 53 men of the rescue party.