The invention relates to a paper bag for packaging bulk material, comprising a standing bottom (2) and a valve bottom (3), a front wall (4) and a rear wall, the front wall and the rear wall being glued to each other in an overlapping relationship, the paper bag further comprising cover sheets (5, 5') for closing the standing bottom (2) and the valve bottom (3), wherein the cover sheet (5) of the standing bottom (2) and/or of the valve bottom (3) is provided with a tear-open strip (6) which extends over the entire length of the bottom. It is characterized in that a foil (9) is inserted below the standing bottom cover sheet (5) and/or below the valve bottom cover sheet (5') and is glued removably to the paper bag (1) in such a manner that after tearing open the standing bottom cover sheet (5) and/or the valve bottom cover sheet (5'), the foil (9) still closes the paper bag (1) completely and releases the product only after said foil is peeled off.