Although metered dose inhalers are devices which have been used and known for along time, they are the devices which give the most applying error. As their usages require hand and respiration coordination, the patient must use the device with a proper technique sothat metered dose inhalers can indicate sufficient effect. Providing proper use of metered dose inhalers by patient and improvement of device using skill are the work of a team. The nurse ,the most important member of this team, can provide the mistakes resulting from misusing of metered dose inhalers for nursing training process by means of training she will give properly through instructive, inquiring ,practicing and coordinator roles. The control and strengthening of the use of metered dose inhalers by the nurse and correcting wrong steps and being noticed wrong steps caused by patient are significant factors for increasing of treatment effectiveness as well as improvement of device using achievement.