<；P>；PROBLEM TO BE SOLVED: To provide a multi-span greenhouse easily and inexpensively constructed, user-friendly and excellent in agricultural workability through widening the spaces between supports set up in the greenhouse. <；P>；SOLUTION: The multi-span greenhouse is provided, 10 where a plurality of roof materials 14 continuously lie in a frontage direction X； ridges can be formed in the frontage direction X as well as in a depth direction Y because an interval S between supports 11b set up inside the greenhouse 10 equals to the distance of a frontage Z, and the greenhouse is excellent in agricultural workability because the interval S is wide enough to allow an agricultural machine such as a tractor to be handled. The greenhouse can be easily and inexpensively constructed when the most of construction materials comprises pipe materials. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
