We have obtained new BVR -band images of the gravitationally lensed QSO pair HE 2149 - 2745 A , B ( QSO redshift z _ { e } = 2.033 ; angular separation \theta _ { AB } = 1 \aas@@fstack { \prime \prime } 71 ) , under 1″ seeing conditions .
Subtraction of a scaled point-spread-function reveals an extended object of angular size comparable to \theta _ { AB } , and R magnitude of 20.4 lying between and equidistant to the QSOs .
The geometry of the system leads us to interpret this object as the lensing agent responsible for the double QSO images .
A fit to the galaxy surface brightness profile indicates an elliptical galaxy , which is further supported by the absence of Mg ii in absorption .
The lensing galaxy is not detected in B and V .
We discuss possible lens models for this geometry constrained by our observations and consequences for the mass and redshift of the lens .