PROBLEM TO BE SOLVED: To provide a slope body effective for weight saving and excellent in high rigidity.SOLUTION: A slope body includes a panel, first and second end panels that are provided at both slope-direction ends of the panel, and first and second side rails that are provided on both side-direction lateral parts of the panel. The ends of the panel are fitted and connected between a pair of flange parts that are provided in the first and second end panels, respectively. A side end of the panel and side ends of the first and second end panels are fitted and connected between a pair of flange parts that are provided in the first and second side rails.