Propagation properties of slab dielectric chirowaveguide have been analysed first in this paper. The field distribution

dispersion relations and cut-off wavenumber equation are given

and the influences of chirality admittance ζc on lowest cut-off wavenumber kc are discussed. It is shown that TE

TM and TEM modes cannot be supported in slab dielectric chirowaveguide. If ζc→0

the results in this paper are all turned into general slab dielectric waveguide’s.