The results are presented dealing with the working out and study of the plasma source of soft X‐ray (SXR) of the new type.Experimental set up included compact low‐inductance vacuum spark (LIVS) with initial energy supply equal up to 2.5 kJ and glass‐capillary concentrator (GCC) of SXR. The characteristics of SXR of vacuum spark and properties of SXR were studied using diagnostic complex. The coefficient of conversion of initial energy supply into SXR (&eegr;) amounted to 0.01 in range 1.2nm. Value &eegr; had peak dependence on atomic number of anode Za. The spectra were recorded belonging to Ne‐like, F‐like ions of Fe, Cu ions and He‐like, H‐like ions of Al, Ti, Fe.Glass capillary concentrator consists of about several hundreds glass capillaries Flux density of SXR in focusing spot was up to 105–106Wt/cm, density of energy is up to 20–30 mJ/cm2at diameter of SXR focusing spot equal to about 2–3mm in the range 0.7–1.0 nm.The plasma source of the new type is intended for X‐ray microscopy, study of influence of SXR on the surface of solid state. It allows to carry out experiments making only on electron synchrotronic sources of SXR.