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Arp 270 (NGC 3395 and NGC 3396) is the system of two actively star-forminglate-type galaxies in contact, which already have experienced at least oneclose encounter in the past. We performed long-slit observations of periphericregions of this merging system with the 6-m telescope of SAO RAS. Line-of-sightvelocity distribution along the slits was obtained for gas and stellarpopulation. We found that the stellar component of NGC 3395 differs by itsvelocity from the emission gas component in the extended region in theperiphery, which evidences a spatial separation of stars and gas in the tidallydisturbed galaxy. Gas abundances obtained by different methods demonstrate thatboth galaxies are mildly underabundant (log(O/H) $\approx 8.4$) withoutsignificant variations of metallicity along the slits. By comparing stellar andgaseous masses of galaxies we came to conclusion that the chemical evolution ofgas is badly described by the closed box model. It allows us to admit that thesignificant part of interstellar gas was swept out of galaxies during thepreceding encounter(s). A special attention was paid to the extended kpc-sizeisland of star formation between the galaxies. We have not found neithernoticeable kinematic decoupling of this region from the adjacent areas, nor anypeculiarities of its emission spectra, which evidences that it was formedrecently from the gas of NGC 3395 in the transition region between thecolliding galaxies.

Outer regions of the merging system Arp 270