One of them approaches the 150ft drop before flinging himself down towards the packed beach while his friend holds back his canopy to stop it getting tangled.
Due to the size of the cliffs, all of the thrill-seekers jumped with their parachutes already deployed as there wouldn't have been enough time to open them mid-air.
One of the jumpers launches himself while his friend holds his parachute
He flies down onto the packed Dorset beach
Bystanders were reportedly stunned at the group's risky stunt , with members of the public reporting falling rocks every time one of them jumped.
Witness Tim Booth, who was on the beach, said: "I had just come out of the sea when I spotted what I thought were the usual idiots stood at the top of the cliff.
"Then one of them jumped and very quickly I saw the parachute behind him.
"The beach was really busy and I saw one canopy land on someone lying on the beach."
Police and Dorset's Coastguard were then called to the scene over fears someone could be seriously injured.
The base-jumpers leap fearlessly off the cliff
A spokesman for the West Bay Coastguard said: "Due to the lower altitudes of the jumps, the practice is considered much more dangerous than skydiving, the cliff is only 150ft high which allows for only a small margin of error when deploying a parachute.
"Multiple calls to the police and coastguard were received from members of the public on the beach who were greatly concerned for the welfare of the jumpers but also for the people on the beach.
"Base-jumping itself is not illegal in this country but there can be associated offenses involved including trespassing on private property to achieve the jump and these matters are dealt with by the police."
The cliffs were made famous in the hit TV show Broadchurch
A police spokesman confirmed to Mirror Online they went to the cliffs but the base-jumpers had left by the time they got there.
A spokesman added: "There is no investigation as no offences were committed, however we would offer the same safety advice as the Coastguard."