Mohammed Adnan, 23, was last seen at his home in Mulloch Avenue, Bainsford, Falkirk on Tuesday, June 17, 2014.
He is described as slim build, short dark hair, clean shaven, pierced left ear, last seen wearing a white short sleeved T shirt, a white short sleeved shirt and blue jeans.
Inspector Donna Bryans said: "This is out of completely out of character for Mohammed to go missing. We and Mohammed's family are concerned for him and they have had no contact with him since Tuesday.
"I appeal for Mohammed or anyone who may have seen or spoken to him to contact us."
Anyone with information should contact Police Scotland on 101 or information can be given anonymously to Crimestoppers on 0800 555 111.