Pedestrian protection airbag for a windshield of a vehicle

The invention relates to a pedestrian protection airbag (PPA) (1) for a windshield (14) of a vehicle to be arranged under a rear section of a hood (18) adjacent to the windshield (14) of the vehicle, wherein the PPA (1) comprises a main chamber (10) and an inlet section (11) for inflating the PPA (1) by a gas flow generated by a gas generator (8), wherein the main chamber (10) is rolled or folded to a tubular shape, wherein the rolled or folded main chamber (10) is folded backwards onto the inlet section (11).