  The relativistic five-quark equations are found in the framework of the
dispersion relation technique. The solutions of these equations using the
method based on the extraction of the leading singularities of the amplitudes
are obtained. The five-quark amplitudes for the low-lying pentaquarks including
the u, d, s- quarks are calculated. The poles of these amplitudes determine the
masses of the negative parity pentaquarks with I = 0, 1 and spin 3/2-, 5/2-.
The mass of the lowest pentaquark with I = 0 and spin 3/2- is equal to 1514
MeV.
