the invention relates to a shock absorption device comprising at least one elongated element for transmitting flexional forces , oriented longitudinally with respect to the ski and having a free end adapted to be displaced longitudinally during bias in flexion . the device comprises likewise : a housing rigidly connected to the ski , provided with an opening for the passage of the free end of the elongated element and an internal seat allowing for the free back and forth movement of the said free end in translation ; at least one shock absorption plate guided in translation in the said seat , comprising at least one layer made out of flexible and / or viscoelastic material in direct contact with the free end ; and an indexing means making it possible to select the number of small plates in the translationally latched position in this said seat , and whose layer of flexible and / or viscoelastic material is biased in shear during displacement of the free end in the seat .