We report the new spectroscopic observations of the gravitational lens RXJ 021+4529 with the multi-mode focal reducer SCORPIO of the SAO RAS 6-m telescope .
The new spectral observations were compared with the previously observed spectra of components A and B of RXJ 0921+4529 , i.e .
the same components observed in different epochs .
We found a significant difference in the spectrum between the components that can not be explained with microlensing and/or spectral variation .
We conclude that RXJ 0921+4529 is a binary quasar system , where redshifts of quasars A and B are 1.6535 \pm 0.0005 and 1.6625 \pm 0.0015 , respectively .