To allow deaeration inside a plastic bag containing food or the like to be done with extremely simple operation in a short time and eliminate a slack and insure a vacuum packed state for a long time when a string is once wound to be bitten.

The simple vacuum packing apparatus has a plastic bag (a) with an opening which can receive an object, a suction port (b) having a through hole and a curved groove 1 which can wrap the suction port (b), and it comprises a tensile contact (c) equipped with a plurality of grooves on a rear and having appropriate hardness and elasticity, a string (d) inserted in the groove of the tensile contact (c) and a pipe (e) to be fitted into the suction port (b).