Three other children, who had been waiting for a bus to go to school by the side of Belghoria Expressway, died on the spot when the truck crushed them on the morning of February 15.
All the four children, in the age group of 5-8 years, belong to a single family.
Officials of the Salt Lake hospital said the child, one leg of whom had been amputated, died at 10.30 PM.
The truck driver was arrested the following day and 11 others were apprehended for the violence.