Many constructionl systems were used in the construction of airports. These systems vary according to the development of the various aircraft models as well as to the increasing number of passengers. This study will include a review of some airports buildings, which had been built depending on the metal construction technique that achieved larger architectural dimensions and spaces for passenger terminal in terms of shape and function. This research includes a study of the evolution of the metal technique used in airport construction especially for passenger terminal showing its effect in realizing the architectural space including its dimensions and spaces and in meeting the functional requirements inside it particularly securing passengers safety, comfort, and the ease of controlling their movement to the taking off places, as well as securing ventilation and natural lighting of the building.