  The mass spectrum and the pionic decay widths of the P-wave $D$ mesons are
studied using the Dirac equation for the light quark. Our aim is to determine
the Lorentz property of the confinement force. We find that the Lorentz scalar
confinement is consistent with the mass spectrum, while a significant mixture
of the Lorentz vector confinement is necessary to explain the decay widths.
