Queensland cop dragged 200m by car

A police officer is recovering after being dragged 200 metres along a road by a car in central Townsville.

Police will allege the driver of the car grabbed the officer's arm after he leant into the car to breath test the driver about 2.40am on Saturday.

The driver then drove about 200m before the 45-year-old officer managed to free himself.

The officer was allegedly elbowed twice in the face.

He has been treated in hospital for a cut to his head and eye, a chipped tooth and multiple abrasions and bruising.

The 23-year-old driver was later involved in a police car chase and has been taken into custody.

Charges are yet to be laid.