  We study the Sagnac effect for matter beams, in order to estimate the
kinematic corrections to the basic formula, deriving from the position and the
extent of the interferometer, and discuss the analogy with the Aharonov-Bohm
effect. We show that the formula for the Sagnac time delay is the same for
matter and light beams in arbitrary stationary space-times, provided that a
suitable condition on the speed of the beams is fulfilled. Hence, the same
results obtained for light beams apply to matter beams.
