A small action team of the ultras fired at the police camp in Hadeli village where some finishing work was underway, following which the security personnel retaliated, he said.
After a brief exchange of fire, the rebels escaped into the dense forest, the official said.
"Head constable Komal Khalko, belonging to DRG, sustained bullet injuries," he said.
The injured jawan was rushed to a local hospital from where he was being airlifted to Raipur for further medication, the official said, adding that his condition was said to be out of danger.
A search operation is underway in the region, he added.
The police camp was recently set up in Hadeli, located 50 kms deep inside forest from Kondagaon town, which is around 200 kms away from here, he said.
The Maoists are upset over the establishment of the camp, which is aimed at stepping up area-domination operation in the region and checking the activities of the rebels, he added.