PURPOSE: To obtain a simple steaming bag for the delicious taste after immediate steaming in simple manner free from failure by attaching a regenerated cellulosic film which is formed through coagulation regeneration and a paper sheet through an adhesive layer and forming a porous sheet having fine holes and forming a bag shape, setting the paper surface inside.

CONSTITUTION: A simple steaming bag 1 is equipped with the front and rear members 2 and 3 which are opposed each other in the longitudinal direction, and the left and right edges and lower edges of these members 2 and 3 are connected and closed each other, and an opened part 4 is formed in the upper part of the bag 1. The front and rear members 2 and 3 and a cover member 5 are formed into a bag shape by forming an obverse side from the regenerated cellulosic film which is the product through the coagulation regeneration of the paper pulp in viscose form, attaching the obverse side with a paper sheet 7 through an adhesive layer 15, and forming a porous sheet having fine holes. When a cooked article 8 is set in the bag 1 and steamed, the cooked article 8 is steamed by the hot steam which is generated from the hot water 10 in a pan container 9 and passes through the fine holes 14 on the outside of the bag 1. Accordingly, the cooked article 8 in the bag 1 is steamed and heated sufficiently, and the steaming unevenness is eliminated.