Resealable packaging bag and closing assembly for same

A bag comprising a closing assembly (100) comprising two complementary elements (110, 120) supported by respective webs (112, 122) at least one of which is integral with a film (10) at a zone (114) located non-superimposed on the corresponding closing element (110) in order to allow the articulation of said web (112) on the film (10), characterized by the fact that the articulated web (112) extends beyond the closing element (110) such that upon engagement of the closing elements (110, 120), the end (115) of the articulated web (112) bears on a structure (20) opposite it and in that it also includes a stress assembly (200) between the walls (10, 20) of the bag, on the side of the closing assembly (100) opposite the free end (115) of the articulated web (112).