Sahil Gulati (16) was sitting behind his father Rajkumar when their scooter was hit by a truck from behind near Azad Market Chowk, they said.
Sahil fell down from the two-wheeler and suffered severe head injuries. His father, however, escaped with minor injuries, police said.
The boy was rushed to hospital where he was declared brought dead.
Sahil and his father were wearing helmets but due to the impact of the accident, Sahil's helmet was broken.