<；P>；PROBLEM TO BE SOLVED: To provide a heating method for agricultural greenhouse by which a large scale double layer-type agricultural greenhouse used for production of orange or the like grown in a greenhouse can be easily provided and heating costs in winter or a cold season can be drastically reduced. <；P>；SOLUTION: The heating method for an agricultural greenhouse comprises lining the side surfaces with a translucent sheet or a translucent film； and placing a translucent air mat 14 in the vicinity of the ceiling surfacethe in the large scale agricultural greenhouse having a ceiling surface, composed of a plane constructional member whose ceiling surface and the side surfaces have lighting property, and employed for production of orange or the like grown in a greenhouse. According to the method, at night, a heater 17 set up in the greenhouse is operated to introduce warm air generated by the heater 17 through a duct 18, disperses and blows out the warm air into the greenhouse, and at the same time, feed a part of the warm air generated by the heater 17 to the translucent air mat 14 to be blown up, and blows out the warm air flowing out of the translucent air mat 14 into the greenhouse, and in the day time, the operation of the heater 17 is stopped. <；P>；COPYRIGHT: (C)2009,JPO&INPIT
