A Queensland police officer has fronted court on an assault charge, accused of throwing a stapler at an offender in a Brisbane watchhouse.

Sergeant John Lloyd-Jones from the Richlands Watchhouse in the city's south was charged with assault occasioning bodily harm whilst armed over the August 9 incident.

A Queensland police officer is accused of assault in a Queensland watchhouse. Credit:Louie Douvis

Police will allege the 51-year-old became frustrated while trying to process an offender who wasn't cooperating.

He threw the stapler and it hit the man in the side of the face, causing a minor impact injury to the jaw, prosecutors will allege.