PROBLEM TO BE SOLVED: To provide a tray for rooftop greening having a novel shape and being simply and firmly arranged in parallel on a roof.SOLUTION: A tray body 10A has a tongue-and-groove structure in which an upper part of a side end part 10b in the lateral direction on one side protrudes more than a lower part thereof and a lower part of a side end part 10b on the other side protrudes more than an upper part thereof in the opposing side end parts in the lateral direction. The tray bodies 10A are continuously arranged in the lateral direction by virtue of tongue-and-groove fitting in adjacent tray bodies 10A.
