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We describe the anisotropy of dark matter clump distribution caused by tidaldestruction of clumps in the Galactic disk. A tidal destruction of clumps withorbit planes near the disk plane occurs more efficiently as compared withdestruction of clumps at near-polar orbits. A corresponding annihilation ofdark matter particles in small-scale clumps produces the anisotropic gamma-raysignal with respect to the Galactic disk. This anisotropy is rather small, 9%,and superimposed on that due to off-centering position of the Sun in theGalaxy. The anisotropy of annihilation signal with respect to the Galactic diskprovides a possibility to discriminate dark matter annihilation from thediffuse gamma-ray backgrounds of other origin.Comment: Accepted for publication in JCAP (minor changes

Anisotropy of dark matter annihilation with respect to the Galactic plane