Supersymmetry is one of the most popular extensions of the Standard Model, but no evidence supporting its validity has been observed at LHC up to date. The second period of data taking at the LHC at 13 TeV of center of mass energy ($\sqrt{s}$), Run-2, started in 2015 and provides an important test field for the search of beyond the Standard Model physics. In particular, the production of supersymmetric electroweak particles, such as sleptons, neutralinos and charginos, could be a promising probe for SUSY signals at LHC, despite the lower cross sections if compared to the ones of the strong production processes. This proceeding summarizes some of the most recent ATLAS results obtained from the searches for sleptons, both produced directly or via $\tilde{\chi}_1^\pm$ or $\tilde{\chi}_2^0$ decays, with 36.1 fb$^{-1}$ of data collected in 2015-2016.