Senior leaders of the BNP-led 20-Party Alliance and people from all walks of life took part in his Namaz-e-Janaza at Baitul Mukarram National Mosque on Friday.
His mortal remains were kept at the mosque's south plaza for people to pay their respects.
Karim died after suffering a cardiac arrest on Oct 13.
Hailing from Comilla, Karim shot into limelight for his performance on television panel discussions.
His comments on the Ganajagaran Mancha, demanding maximum penalty for war criminals, and trial process of suspected war criminals invited bitter criticism from various quarters.
Several organisations vehemently protested against his family's announcement to take his body to the Central Shaheed Minar for people to pay their respects.