We report the discovery of a 1 \arcdeg scale X-ray plume in the northern Galactic Center ( GC ) region observed with Suzaku . The plume is located at ( l , b ) \sim ( 0 \fdg 2 , 0 \fdg 6 ) , east of the radio lobe reported by previous studies . No significant X-ray excesses are found inside or to the west of the radio lobe . The spectrum of the plume exhibits strong emission lines from highly ionized Mg , Si , and S that is reproduced by a thin thermal plasma model with kT \sim 0.7 keV and solar metallicity . There is no signature of non-equilibrium ionization . The unabsorbed surface brightness is 3 \times 10 ^ { -14 } erg cm ^ { -2 } s ^ { -1 } arcmin ^ { -2 } in the 1.5–3.0 keV band . Strong interstellar absorption in the soft X-ray band indicates that the plume is not a foreground source but is at the GC distance , giving a physical size of \sim 100 pc , a density of 0.1 cm ^ { -3 } , thermal pressure of 1 \times 10 ^ { -10 } erg cm ^ { -3 } , mass of 600 M _ { \sun } and thermal energy of 7 \times 10 ^ { 50 } erg . From the apparent association with a polarized radio emission , we propose that the X-ray plume is a magnetized hot gas outflow from the GC .