Ben Cameron, 25, is last known to have been in the Paddock Wood area at around 4pm on Monday 9 July 2018.
Ben is described as being white, 5ft 10in tall, of proportionate build with dark brown hair. He was wearing a turquoise checked zip up fleece, white football shorts and grey trainers when he went missing.
Investigating officers believe Ben may have travelled to the London area.
Anyone who sees him or has information that may help is asked to call Kent Police on 101 quoting 09-1522.