Police are becoming increasingly concerned for a 40-year-old man who was last seen on the coast road in Portslade.
Paul Stoneham left his home in Burgess Hill at about 8pm on Wednesday 23 April and has not been seen or heard from since.
His green Vauxhall Astra, registration number HK55HNN, was seen on the A259 in Portslade the next morning but has not been seen since.
Sussex Police said that Mr Stoneham has short light brown hair and was wearing blue Adidas tracksuit bottoms and possibly a fleece when he left home.
PC Heather Mackay said: “We’re becoming increasingly concerned for Paul as we have had no sightings of him for more than a day now.
“His wife and family are extremely worried about him and need to speak to him to make sure he is ok.
“If you know where he is or have seen him or his vehicle, please contact us.”
Anyone with information is asked to phone Sussex Police on 101 or email 101@sussex.pnn.police.uk.