Аннотация:For the central part of Seyfert galaxy Mrk 3 the authors present the observations of the line-of-sight velocity field of the ionized gas and the surface brightness distributions as in continuum as well in emission line [O III], obtained at the 6-m telescope. These data suggest an existence of gaseous disk perpendicular to the major axis of the galaxy ellipsoid; the inner part of the disk counter-rotates relative to the outer parts. There are some evidence of the radial gas inflow having the velocity near 450 km/s.