The magnetic form factor and the magnetic moment per Fe atom (μ_Fe) are determined by neutron diffraction of single crystals. The Fe atoms on the B sublattice with 8 Fe nearest neighbors (NN) have the moment of 2.18 μ_B and the e_g ratio (γ) of 0.60 at 290 K, where γ means the fraction of polarized electrons with the e_g symmetry and the remaining (1−γ) have the t_2g symmetry. Those on the A and C sites with 4 Fe and 4 Ga NN have the moment of 1.50 μ_B and γ of 0.48. The results are discussed with reference of the Mössbauer analysis and compared with the moments and internal fields of Fe₃Al and Fe₃Si.