  We report on VLBA observations of a gamma-ray bright blazar NRAO 530 at
multiple frequencies (5, 8, 15, 22, 39, 43, and 45 GHz) in 1997 and 1999. These
multi-epoch multi-frequency high-resolution VLBI images exhibit a consistent
core-dominated morphology with a bending jet to the north of the core. The
quasi-simultaneous data observed at five frequencies (5, 8, 15, 22 and 43 GHz)
in February 1997 enable us to estimate the spectra of compact VLBI components
in this highly variable source. Flat spectra are seen in central two components
(A and B), and the most compact component A with the flattest spectral index at
the south end is identified as the core.
