The invention relates to an internal washing device for containers comprising a base (4) with a structure including telescopically extendable sections (1, 2, 3) and in which at least one cleaning element is housed, where the base (4) comprises a drive shaft (26), each section (1, 2, 3) comprises at least one toothed longitudinal segment configured to engage with at least one pinion (5) fastened to the drive shaft (26), the sections (1, 2, 3) comprise a push pawl (8, 9, 10), the initial section (1) incorporates a support element on the forward end, and the additional sections (2, 3) incorporate a pull pawl (6, 7) and a recess (15, 16) for the fastening of the corresponding push pawl (8, 9, 10), such that the drive shaft (26) has the ability to operate all the sections (1, 2, 3) without needing to move.
