The supporters threw flowers at the casket as they shouted slogans like "Qadri, your blood will bring the revolution" and "The punishment for a blasphemer is beheading".
Pakistan remained on high alert as the garrison city of Rawalpindi witnessed a large number of Qadri's supporters converge for the funeral.
Security personnel were deployed at all main junctions and sensitive areas in the capital and the adjacent Rawalpindi to avoid any untoward incident as some supporters were also seen carrying sticks.
The gathering was peaceful as the body was taken for burial at Qadri's ancestral village near Bhara Kahu in suburbs of Islamabad.
Roads around government buildings, the Parliament and diplomatic compounds were closed.
"Police is on high alert and special measures have been taken to check any untoward incident. Nobody will be allowed to create any kind of disturbance," an Interior Ministry official said.
Former police commando Qadri, who shot Taseer 28 times in broad daylight in an upmarket locality of Islamabad in 2011, was hanged in Adialia jail in Rawalpindi yesterday.
His execution triggered protests by thousands of Islamists who called it a "black day". Within hours of the hanging, street protests broke out in several cities by the supporters of Qadri, who considered him as a hero for defending the faith.
The supporters blocked roads and forced many shopkeepers to close down their stores.
After the execution, Qadri's body was handed over to his family living in Sadiqabad area of Rawalpindi where hundreds of his supporters belonging to radical religious groups gathered to mourn his death.
Blasphemy is a sensitive issue in Pakistan, with even unproven allegations often triggering mob violence.
The controversial law was introduced by former military dictator Zia-ul Haq in 1980s and so far hundreds of people have been charged under it.
