  We have measured the proper motion of the candidate optical counterpart of
the old, nearby pulsar PSR B1929+10, using a set of HST/STIS images collected
in 2001, 7.2 years after the epoch of the original FOC detection (Pavlov et al.
1996). The yearly displacement, mu=107.3+/-1 mas/yr along a position angle of
64.6+/-0.6 deg, is fully consistent with the most recent VLBA radio
measurement. This result provides a robust confirmation of the identification
of PSR B1929+10 in the optical band.
