Measurement of the higher order azimuthal anisotropy (vn) for charged hadrons at RHIC-PHENIX, M. Shimomura, Iowa State University, USA Measuring the azimuthal anisotropy of particles produced in relativistic heavy ion collisions has been considered as a powerful probe for investigating the characteristics of the quark-gluon plasma (QGP), which is the phase in QCD matter of de-confined quarks and gluons.  In RHIC-PHENIX experiment, we measured several orders of the event anisotropy (v2,v3,v4) at Au+Au in 200 GeV for several centrality bins using the event plane method.  The results of these higher-order event anisotropy constrain the initial geometrical eccentricity and viscosity that are used in hydrodynamical models.  We will present the results of v2, v3, v4 measurement and discuss the simultaneous description with the hydrodynamical calculations.