  We present 97 QSO candidates in 48 Galactic Bulge fields of the Optical
Gravitational Lensing Experiment II (OGLE-II) covering about 11 square degrees,
which are selected via their variability. We extend light curves of variable
objects which were detected in 3-year baseline in the OGLE-II variable star
catalog to 4th year. We search for objects which are faint (16<I_0<18.5) and
slowly variable during 4 years in this catalog by using the variogram/structure
function. Finding the QSOs in such stellar-crowded and high extinction fields
is challenging, but should be useful for the astrometric reference frame.
Spectroscopic follow-up observations are required to confirm these QSO
candidates. Follow-up observations are being prepared for four of these fields
(BUL_SC1, 2, 32 and 45). Follow-up observations for other fields are strongly
encouraged. The complete list and light curves of all 97 candidates are
available in electronic format at
http://www.astro.princeton.edu/~sumi/QSO-OGLEII/.
