A rung for use in a ladder section of a collapsible ladder (1) is provided. The collapsible ladder comprises several ladder sections (5, 5a-5j), where each ladder section comprises two ladder tubes (10, 12) arranged parallel to each other and interconnected by the rung (20) to form the respective ladder section, and where each ladder tube (10, 12) is telescopically inserted into a ladder tube (10, 12) of a lower ladder section to form the collapsible ladder (1), the rung (20) comprising a main section (22), a first bracket section (24a) and a second bracket section (24b), wherein the first and second bracket sections (24a, 24b) are arranged at each end of the rung (20) to receive the respective ladder tube (10, 12). The rung (20) is characterized in that the main section (22) and the first and second bracket sections (24a, 24b) are provided as an integrated unit.