Police are looking for 72-year-old Kenneth Kidd from Chichester, after he was last seen at two pubs in the city (believed to be The Fountain and The Foundry) on Tuesday 12 April.
He subsequently missed an appointment the next day.
Kenneth (or Ken as he is also known), is white and has grey hair. He is of slim build and his current clothing is unknown.
He is known to travel extensively throughout the country.
If anyone has any information, or has seen Ken, they are urged to contact police online, or via 101, quoting serial 684 from 14/04.