  We present the results of the spectroscopic study of a chemically peculiar
star HD 152564. Using medium-resolution ($R=37000$) observations obtained with
the HRS spectrograph mounted on the South African Large Telescope we determined
atmospheric parameters T$_{eff}$=11950$\pm200$ K and log g=3.6$\pm0.2$ dex.
Abundance analysis revealed mild deficiency of the light elements and an
overabundance of up to $\sim$2 dex of metals with greatest excess for the
silicon. With these characteristics HD 152564 is a typical member of the
silicon subgroup of Ap stars. Rotational modulation of the light curve and line
profiles of HD 152564 are typical for inhomogeneous surface distribution of
elements in its atmosphere. We performed multi-element Doppler imaging of the
HD 152564 surface. Abundance maps constructed for He, O, Mg, Si, and Fe
revealed concentration of these elements in a sequence of equatorial spots as
well as in the circumpolar rings. The photometric maximum of the light curve
coincided with the visibility of two most overabundant silicon spots.
Abundances determined from the different ionisation stages of Fe and Si show
clear evidence for vertical stratification of these elements in HD 152564
atmosphere. Meanwhile, the horizontal distribution of silicon reconstructed
from the lines of different ionisation stages and excitation energies appeared
to be identical with increasing average abundance deeper in atmosphere.
