PROBLEM TO BE SOLVED: To provide a sheet for a multi-span house valley having excellent weather resistance while holding high light transmitting property and laying easiness, and a laying structure.SOLUTION: The sheet for the multi-span house valley contains linear low-density polyethylene polymerized by a metallocene catalyst, as a main polymer. It is preferable that the sheet for the multi-span house valley contains branched low-density polyethylene as a sub-polymer, contains a weather resisting agent, and has an average thickness of 500 μm or more and 1,200 μm or less, and that at least one surface of the sheet for the multi-span house valley has a surface roughness (Ra) of 0.1 μm or more and 0.2 μm or less. The laying structure is provided for laying the sheet for the multi-span house valley on the multi-span house using fixing members.
