The spokesman said the shark was still hanging onto the kayak when the man managed to climb back on board.

"The kayak had been punctured and was apparently sinking but an air pocket in the front prevented it from sinking," he said.

"The shark was seen circling but it didn't come back again."

Queensland Ambulance Service Birtinya officer-in-charge Keren Hanwright said they received reports a kayaker had been knocked off his craft by a shark at Kings Beach about 6.30am.

"This gentleman was an experienced kayaker, he happens to carry a radio for safety reasons and he used this radio to call for help," she said.

"A nearby kayaker has come to his aid, closely followed by surf life savers."

Life savers used jet skis to bring both men back to shore.

Ms Hanwright said both men suffered from mild shock but were otherwise uninjured.

"Both have gone home today," she said.

A Queensland water police vessel with two men on board has retrieved the kayak by 10.45am.

Police Sergeant Kyle Bates told Seven News the recovered kayak had teeth marks.

Sergeant Bates said while he couldn’t confirm it, it was possible the man had been scattering bait in the water to attract fish.

“The shark might have just been attracted to that,” he said.

“I would suggest this was more than likely a one-off incident.”