This cartridge is provided with a flavor source housing which houses a flavor source, and a mesh body which is arranged on at least one end of the flavor source housing. The mesh body has multiple openings. Each of the openings has a polygonal shape with interior angles of less than or equal to 180°. As lengths that pass through the center of gravity of each opening, each opening has a minimum length that is shortest and a maximum length that is longest. The minimum length is less than the smallest size of the raw material pieces, and the maximum length is greater than the minimum length.
