Medics rushed to the scene on Dubarry Avenue, near Dawley Brook Primary School in Kingswinford, at 3.16pm today.
The Midlands Air Ambulance from Cosford attended the scene along with a paramedic officer and an ambulance.
The boy, a pedestrian, was said to have suffered "potentially serious injuries" according to West Midlands Ambulance Service.
A spokesman for West Midlands Police said the boy suffered a head injury, which was not believed to be life-threatening or life-changing.
He was taken to Birmingham Children's Hospital by land ambulance.