Police are appealing for information on the whereabouts of Zahim Shah, of Bradford.
Zahim, 38, was last seen in North Avenue in the BD8 area of the city at about 10.45am on Monday, 18 April.
He is described as Asian, about 5ft 6ins tall and of slim to medium build with brown eyes and black hair.
He was last seen wearing a khaki-coloured bomber jacket, light blue tracksuit bottoms and blue trainers.
He has tattoos of symbols on his neck and right arm and also a scar on his right hand.
Police have carried out extensive enquiries to trace Zahim and are concerned as he has not been seen for several days.
He has connections to the Halifax and Leeds areas.
Anyone who sees Zahim is asked to contact police in Bradford on 101, quoting log *476 of 18 April.