Gwent Police is appealing for information to trace 54-year-old Stephen Cartwright, who is missing from the Hengoed area.
Mr Cartwright was reported as missing to police on Tuesday February 22. He is described as white, 5ft 7 in tall and of slight build. He has grey shoulder length hair and is believed to be wearing a black woollen jacket, blue jeans and boots.
Officers believe he may be in the Caerphilly County Borough area.
Anyone with information relating to his whereabouts is asked to contact Gwent Police on 101.