The swing at Whanganui's Mosquito Point has been "temporarily decommissioned" while Whanganui District Council reviews a December 18 incident where a child was injured.
The review follows a report to the council of another injury on January 10.
Council chief operating officer Bryan Nicholson said the two incidents were "reasonably serious".
The review will determine whether risk from the swing can be minimised. When it's finished, recommendations will be made to Whanganui's mayor and council.
The swing has been removed in the interim, but its pole and safety message are still up at the Whanganui River swim spot.