Sunil Kumar Chikara was stabbed around 10.15 a.m. at Sector-11, Rohini in west Delhi and was rushed to Dr. Bhim Rao Ambedkar Hospital.
He is contesting the MCD elections from Rohini's ward number-21.
"He had a stab injury on his back," said a police official. According to police, at the time of the incident he was heading to a nearby barber's shop. He is a resident of Sector-16 Rohini.
A case has been registered against unidentified people.
"As per Chikara's statement, the accused were unknown to him. A hunt is on to nab them," said the official.
This is the second incident of violence related to the MCD polls, with a Bharatiya Janata Party worker being killed Tuesday night by the supporters of a councillor of his own party.