It happened on wasteland close to Midland Road in Frizinghall at about 5am on Saturday, 29 July, when a 30-year-old man was approached by a male who made demands for property.
The male was then joined by two others and an altercation ensued which resulted in the victim running off.
As the victim fled he realised he had been stabbed.
He was taken to hospital where he received treatment for the injury and was later discharged.
Nothing is believed to have been taken from the victim.
The suspect is described as pale skinned, of skinny build and is believed to be in his thirties.
He had dirty blonde/brown hair and was wearing a dark hooded top.
Anyone who recognises this male is asked to contact PC 1039 Kisby at Bradford District CID on 101, quoting crime reference 13170347420.
Information can also be given anonymously to the independent charity Crimestoppers on 0800 555111.