A 6.65 m vacuum ultraviolet (VUV) spectrometer has been designed and fabricated indigenously using concave grating (concave radius = 6.65 m) of frequency 4800 grooves/mm for carrying out spectroscopic research of atomic and molecular gases and vapours using synchrotron as a source of radiation. The wavelength range of the spectrometer is 700–2000 Å. The reciprocal linear dispersion of the instrument is about 0.3 Å/mm. The experimentally estimated value of the wavelength resolution is 0.01 Å. The spectrometer has been tested by recording spectral lines of wavelengths 1228.79 Å (nitrogen), 1243.18 Å (nitrogen), 1261.55 Å (carbon), 1288.42 Å (nitrogen), 1930.9 Å (carbon) under a vacuum of 10^–5 torr by exciting residual gas molecules in a rotary pump evacuated discharge tube.