  We investigate AdS3/CFT2 correspondence in three dimensional supergravity. We
construct a current for general coordinate invariance and that for local
supersymmetry via covariant approach. Hamiltonian and supercharge are well
defined in terms of vielbein and spin connection. After discussing asymptotic
supersymmetry group at the boundary of AdS3 geometry, we show that there exist
a direct product of Virasoro algebras at the boundary. We also show that one of
them is extended to super Virasoro algebra.
