The incident happened outside the extension building of Supreme Court.
The Delhi Police have identified the victim as Rajbhar Gupta. He has now been admitted to a hospital.
This is the second such incident in recent past.
In August last year, two persons in their twenties had attempted to immolate each other outside the Court campus.
They had poured petrol over themselves on the road and used a cigarette-lighter to set themselves on fire, before they tried to rush inside the Supreme Court campus through Gate D.
Both had later succumbed to their injuries.