Matter combustion phenomena are usually observed and learned by pupils, the "air" is learned at the first, second years in elementary school, too. But "air" have ignition and other physical characters, also the component and heat variance of it were not concerned. All natural science textbooks of elementary schools in Japan have six series whose property content, perfect printing is available reference for the edit-experts or the teachers. This is intensive exploration on the textbook of the unit concerning "combustion and air" in the natural science course for pupils at elementary schools in Japan. Therefore, it is advisable to offer such teaching material as reference to the researchers, experts and schools teachers who are concerning on natural sciences teaching in elementary school in Taiwan.