High-quality single crystals of UFeGa5 were grown by the Ga-flux method. The structure of UFeGa5 single crystal was studied by X-ray diffraction and Rietveld method. The results show that the structure of as-grown UFeGa5 single crystal is good and its crystallinity is well. The UFeGa5 has the HoCoGa5 type-structure with space group P4/mmm (No.123). The lattice constants are a=0.42533(2) nm and c=0.67298(3) nm. The crystal structure results are confirmed by transmission electron microscopy