In a device for cutting single blister packs from a blister band, a cutting member acts in a longitudinal direction with respect to the blister band, along the longitudinal edges thereof, so as to cut side extending strips of the blister band which extend beyond the length of the blister pack being produced. Cut out elements operate in alignment with a cutting line of the cutting member to cut shaped pieces of the blister band, so as to define corner zones of the blister packs. Shearing means operate crosswise to the blister band, in alignment with the corner zones defined by the cut out means, to separate single blister packs. The position of the cutting means and cut out means and/or the shearing means can be adjusted to produce blister packs having different sizes.