LHCb results on rare leptonic decays of B-mesons

A search for the rare leptonic decays was performed, using the proton-proton collision data collected with the LHCb experiment at center-of-mass energies of 8TeV and 13TeV. The following analysis are reviewed in this work: Measurements of the B$^0_s$ → µ$^+$µ$^-$ branching fraction and effective lifetime and search for B$^0$ → µ$^+$µ$^-$ decays, Search for the decays B$^0_s$ → τ$^+$τ$^-$ and B$^0$ → τ$^+$τ$^-$, Search for the lepton-flavour violating decays B$^0_{(s)}$ → e$^\pm$µ$^\mp$, Search for the lepton-flavour-violating decays B$^0_s$ → τ±µ∓ and B$^0$ → τ$^\pm$µ$^\mp$, Search for the rare decay B$^+$ → µ$^+$µ$^-$µ$^+$ν$_\mu$ All results are consistent with the Standard Model. Nearly all results presented are either unique or the most accurate for the time.