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The isothermal section at 650 degrees C and the vertical section Fe-(Ga0.75Al0.25) of the Fe-rich portion in the Fe-Ga-Al ternary system were determined using optical microscopy, scanning electron microscopy, energy dispersion X-ray spectroscopy, X-ray diffraction and differential thermal analysis. The isothermal section of the Fe-rich portion consists of 4 single-phase regions: A2, B2, D0(3), D0(19), and 4 two-phase regions: A2 + B2, A2 + D03, D03 + D019 and B2 + D019. No fcc L1(2) phase region occurs in the isothermal section of the Fe-rich portion. The vertical section Fe-(Ga0.75Al0.25) Of the Fe-rich portion consists of 3 single-phase regions: A2, B2 and D03, 4 two-phase regions: A2 + D03, D03 + D019, A2+L12 and D0(3)+L1(2), and 2 three-phase regions: D03 + D019 + L12 and A2 + D03 + L1(2).