Police have launched an attempted murder probe following the attack in Cumbernauld, North Lanarkshire.
The 25-year-old was stabbed several times on the neck and body just after 6.30pm on Saturday while walking in Stoneylee Road.
He was taken to Monkland's Hospital where his condition was described as critical.
Detectives are carrying out door-to-door inquiries in a bid to find his attacker and are studying CCTV foootage.
DCI Pat Campbell, who is leading the investigation, said: "This was an extremely violent attack which has left a young man fighting for his life.
"It happened in broad daylight in a busy residential area, so I'm convinced someone knows who's responsible."
Meanwhile, four men were badly injured during a spate of violent attacks in Glasgow's South Side. A gang of thugs attacked two men with machetes, near The Vital Spark pub, in Govan Road.
The victims, both 29, were attacked by three men at 7pm on Sunday.
One man received a serious injury to his hand, and the other had a cut on his head.
The assaults all took place on Sunday night, but officers believe that they are unconnected.
In another incident, around an hour later, a 24-year-old man was found badly injured in a house in Balbeg Street.
He had been stabbed in the neck and on his thigh.
In a third attack, at around 10pm on Sunday, a 21-year-old man was hit on the head with a bottle in Gleddoch Park, Penilee.
All four men were taken to the Southern General Hospital for treatment.
Detective Inspector Alan McAlpine, of Glasgow CID, has appealed for any witnesses to come forward.
He said: "I wish to emphasise that attacks of this type are very rare.
"Police Scotland is working with local partners in these areas to track down the people responsible for these attacks.
"And there are also extra patrols out in these areas to reassure local people. Anyone who has any information about these attacks should contact Police Scotland."
Witnesses are asked to contact local police on 101.