Ringwood Police Chief Joseph Walker said the tree fell on Officer Douglas Faber on Greenwood Lake Turnpike around 6:45 a.m.
Faber, 33, had gotten out of his car to move the branches when the larger tree fell and hit him.
He reportedly broke his wrist and received 13 stiches on the top of his head.
The incident was captured on his DashCam. Click on the video player above to watch it.
Faberhas been on the force for seven and a half years. He was treated and released from the hospital.