PROBLEM TO BE SOLVED: To solve the problem that although a cooking method by a microwave oven is an easy and safe heating method, it is difficult to uniformly heat food materials since there is a difference in a microwave absorption property of each food material, and the problem that a microwave oven has tended to increase its output in recent years, and heating unevenness has tended to become large.SOLUTION: An opening is provided to a microwave absorbing package formed by being coated with an absorption layer consisting of conductive liquid and an absorption material, and the microwave absorbing package is mounted on a container for microwave oven cooking for doing microwave oven cooking so that food material heating temperature can be adjusted. Preferably, an opening ratio of the opening provided to the microwave absorbing package is 0.005-25%. A water absorption rate of the absorption material is 2 g/g or more, and the thickness is 0.1-5 mm. The conductive liquid is preferably impregnated with 100-2000 g/m2 of sodium chloride solution with a concentration of 1-28 mass%.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】電子レンジによる加熱調理方法は、簡便かつ安全な加熱方法であるが、各食材のマイクロ波吸収特性に違いがある為、均一に加熱することは困難である。更に、電子レンジは近年高出力化傾向にあり、加熱ムラが大きくなる傾向である。【解決手段】導電性液体と吸収材からなる吸収層を被覆して成るマイクロ波吸収包装体に開口部を設け、電子レンジ加熱調理用容器に装着して電子レンジ加熱調理を行う事により、食材の加熱温度が調整できる。好ましくは、マイクロ波吸収包装体に設けた開口部の開口率は0.005~25%、吸収材の吸水率2g/g以上かつ厚み0.1~5mmであり、導電性液体は濃度1~28質量%の塩化ナトリウム水溶液を100~2000g/m2含浸させる事が好ましい。【選択図】なし