PROBLEM TO BE SOLVED: To provide a packaged rice mass such that a cooked rice mass is housed in a package bag formed of a sheet prepared by putting a laver sheet between both of the inner and outer films, so as not to make adhesion between the films get in the way when unwrapping the packaged cooked rice mass with the opening of the package bag welded to be sealed.SOLUTION: The packaged rice mass is structured as follows: the welded/sealed part 7 of the package bag opening 13 is formed corresponding to the superimposed part at the inner ends of two film pieces 41, 42 forming an inner film 4, and comprises a weakly welded part 71 welded weakly to the extent that the welded/sealed part is easily peeled if pulled, and strongly welded parts 72, 72 formed corresponding to the other parts and not easily peeled even when pulled.COPYRIGHT: (C)2010,JPO&INPIT【課題】内、外両フィルムの間に海苔を挟んだシート体によって形成した包装袋に飯塊を収容して、袋開口を溶着封止した包装飯塊の包装を解く際に、フィルムどうしの溶着が邪魔にならない様にする。【解決手段】袋開口13の溶着封止部7は、内フィルム4を構成する2枚のフィルム片41、42の内端どうしの重なり部に対応して施され、引っ張れば容易に剥離する程度に弱く溶着されている弱溶着部71と、それ以外の部分に対応して施され引っ張っても容易に剥離しない強溶着部72、72とからなる。【選択図】図5
