  The peculiar velocities of galaxies distort the clustering pattern
anisotropically in redshift space. This effect on the statistics of isodensity
contours is examined by linear theory. The statistics considered in this paper
are the three- and two-dimensional genus of isodensity contours, the area of
isodensity contours, the length of isodensity contours in the 2-dimensional
slice and the level crossing statistics on the line. We find that all these
statistics in redshift space as functions of density threshold of contours have
the same shape as in real space. The redshift space distortion affects only
amplitudes of these statistics. The three-dimensional genus and the area hardly
suffer from the redshift space distortion for $0 \leq \Omega b^{-5/3} \leq 1$,
where $b$ is a linear bias parameter. The other statistics are defined in one-
or two-dimensional slices of the sample volume and depend on the direction of
these slices relative to the line of sight. This dependence on direction of
these statistics provides a way to determine the density parameter of the
universe.
