A laser processing nozzle coupling assembly for connecting a laser processing nozzle to a laser processing head includes a hollow sleeve, a laser processing nozzle adapted to be removably coupled to the sleeve, and a collar for coupling the nozzle to the sleeve. The nozzle is displaceable within the sleeve along a longitudinal axis of the sleeve, and the collar is displaceable along a surface outside the sleeve. The sleeve, the nozzle, and the collar are adapted to co-operate to release the nozzle from a locked position within the sleeve when the nozzle is displaced in a first direction within the sleeve and then displaced in a second direction opposite to the first direction.