  The charged 2D black hole is visualized as presenting an potential barrier
$V^{OUT}(r^*)$ to on-coming tachyon wave. Since this takes the complicated
form, an approximate form $V^{APP}(r^*)$ is used for scattering analysis. We
calculate the reflection and transmission coefficients for scattering of
tachyon off the charged 2D black hole. The Hawking temperature is also derived
from the reflection coefficient by Bogoliubov transformation. In the limit of
$Q \to 0$, we recover the Hawking temperature of the 2D dilaton black hole.
