Ma-useng Haji Abubaka, 37, of tambon Ko Sathon was walking from his house to the cemetary to clean it when he was shot, said Pol Lt Boonsanit Kheopradit, a duty officer at Tak Bai police station.
The murder happened bout 8am.
Ma-useng was hit three times in the body and seriously wounded.
He was admitted to Tak Bai hospital where he was later pronounced dead.
Police were investigating into the case.