To provide a bag squeezing device in the form of scissors, in which a simple structure is realized without increasing its size.

The structure of the bag squeezing device 1 is such that through-holes 5a and 5b are made through the upper blade 4a and lower blade 4b of the scissors in the longitudinal direction of the upper and lower blades 4a and 4b. A bag, such as a retort pouch, is passed through the through-holes 5a and 5b kept coinciding with each other, and the bag squeezing device 1 and the bag are moved relative to each other. Thus, the contents of the bag can easily be squeezed out.