PROBLEM TO BE SOLVED: To provide a packaging sheet capable of avoiding, even in a state where a rice ball is being packaged thereby, the dampening of a sheet-shaped foodstuff over an extended period.SOLUTION: In the packaging sheet 1 of the present invention, a sheet-shaped foodstuff 5 is sandwiched between an outer film 2 having a rectangular shape in the unfolded state thereof and an inner film 3 outfitted on the rear plane side of the outer film 2, and the outer film 2 and inner film 3 are integrated by welding portions of thereof surrounding the outer boundaries of the sheet-shaped foodstuff 5, wherein: the outer film 2 has a dividable portion 21 the inner film 3 is constituted, on one side thereof, by a single film piece 31 and, on the other side thereof, by two laminated film pieces 32 and 33 and has an overlap portion 34 having a three-tier structure in which the film piece 31 is sandwiched between the respective inner edges of the two film pieces 32 and 33 in the vicinity of the dividable portion 21 and the overlap portion 34 is formed by heat-welding 36 the respective film pieces 31, 32, and 33 each other over the entire length along the inner edges thereof.COPYRIGHT: (C)2014,JPO&INPIT【課題】飯塊を包装した状態でも、長期に亘ってシート状食品が湿気らない包装シートを提供する。【解決手段】本発明に係る包装シート1は、展開状態にて、長方形の外フィルム2と該外フィルム2の裏面側に配備された内フィルム3との間にシート状食品5を挟み、外フィルム2と内フィルム3は、シート状食品5の外周を溶着して一体化された包装シートであって、外フィルム2は分断可能部21を有し、内フィルム3は、一方側は1枚のフィルム片31、他方側は2枚のフィルム片32,33を重ねて構成され、前記フィルム片31が前記分断可能部21の近傍で2枚のフィルム片32,33の内縁に挟み込まれて3重に重なった重なり部34を有し、前記重なり部34は、フィルム片31,32,33の内縁に沿って全長に亘って互いに熱溶着36されている。【選択図】図3
