  The results of an analysis of the substructure of 1 degree field galaxies of
the Virgo cluster by means of the S-tree technique developed by Gurzadyan et
al, are represented. The existence of 3 main subgroups is shown and their
dynamical parameters are obtained. The mass centers of the subgroups appear to
be aligned in the direction parallel to the elongation of the Virgo cluster.
The morphological analysis shows some domination of dwarf galaxies in the
subgroup A containing M 87, and existence of two spiral galaxies N4425 and
N4461; the latter fact can be crucial for the estimation of the distance of the
Virgo cluster by means of the search of Cepheids in that spirals.
