An air brush having an easily installed nozzle member and a cost-effective extremity end member. The nozzle member is held between a nozzle cap and an outlet end of the main body of the air brush. The nozzle member is made such that it's front and rear parts are substantially conical in shape. An insertion hole extends through and is formed in the nozzle member. The rear part of the nozzle member is inserted into the tapered hole at the outlet end of the main body of the air brush. The front part of the member is internally fitted into the nozzle cap and secured. The nozzle member is made such that it's outlet end is composed of the extremity end member. The extremity end member is made of SPM material which is harder, stronger and more durable than the other portions of the device, and the extremity end member includes a very strong nozzle section in order to prevent the occurrence of corrosion or cracks.