  We obtain the quasi-normal mode frequencies of scalar perturbation on new
type black holes in three dimensional new massive gravity. In some special
cases, the exact quasi-normal mode frequencies are obtained by solving scalar
field equations exactly. On some parameter regions, the highly damped
quasi-normal mode frequencies are obtained in an analytic form by the so-called
Stokes line method. This study on quasi-normal modes shed some light on the
mysterious nature of these black holes. We also comment about AdS/CFT
correspondence and the entropy/area spectrum for new type black holes.
