************************************************************************* 61150 We detected an ionized iron line from NGC4579 in spite of very low luminosity Lx=1.4E41ergs/s by a 30ksec ASCA observation. The center energy of the line (6.7keV) is significantly higher than 6.4keV which is typical for usual Seyfert 1 galaxies. We propose detailed measurements of iron line profiles in the low luminosity Seyfert 1 galaxy NGC4579. We investigate dynamical and ionization structure of an accretion disk in this remarkable Seyfert galaxy using line profiles and center energy. We also determine size and density of a disk comparing our X-ray results with blackhole mass determined with HST STIS data. *************************************************************************