Spatially resolved FeK&agr; spectra in the wavelength range of 1.7–2.0 A˚ (FeII‐XXVI) and 1.91–1.95 A˚ (FeII‐XIX) are first observed in a single shot with low‐resolution Johansson and high‐resolution Johann type crystal spectrometers, respectively. The spectra show the evident proof that the vacuum spark plasma has two different structures. One is a thermalized point plasma (≲10 &mgr;m) with high temperature (Te∼2 keV) and high density (ne∼1021cm−3). The spectrum contains x‐ray lines from FeXXIII‐XXVI. The other is an extended plasma (∼3 mm) associated with nonthermal electrons, where the region of intense emission ofK&agr; lines from FeIII‐XX shifts toward the cathode with the increase of the ionic charge.