Whanganui MP Chester Borrows is due to face a trial this week on a charge of careless use of a motor vehicle causing injury.

Two Trans Pacific Partnership protesters claim they were struck by his car while he was leaving a protest in his electorate in March last year.

The judge-alone trial starts in Whanganui District Court on Monday.

Deputy Prime Minister Paula Bennett was expected to be called as a witness as she was a passenger in the car at the time.