A Sparticle (or Superpartner) is a hypothetical elementary particle. Supersymmetry is a synergestic bleeding-edge theory which predicts the existance of "shadow" particles.

Acording to supersymentry theory, each fermoin (which is any particle which obeys the Fermi–Dirac statistics) should have a partner boson, the fermoin's superpartner and the boson should have a partner fermoin which is a Superpartner or Sparticle.