  The value of the bottom quark mass at M_Z in the DR-bar scheme is an
important input for the analysis of supersymmetric models with a large value of
tan(beta). Conventionally, however, the running bottom quark mass extracted
from experimental data is quoted in the MS-bar scheme at the bottom mass scale.
We describe a two loop procedure for the conversion of the bottom quark mass
from MS-bar to DR-bar scheme. The Particle Data Group value m_b(m_b) = 4.2 \pm
0.2 GeV in the MS-bar scheme corresponds to a range of 2.65-3.03 GeV for
m_b(M_Z) in the DR-bar scheme.
