  Shortly after the discovery of PSR J1906+0746, some hints of profile
variations were already interpreted as first signs of relativistic
spin-precession occuring. Using observations from the Nan\c{c}ay, Arecibo and
Green Bank Radio Observatories, we report here the measurement of pulse profile
and polarimetric variations. Using the Rotating Vector Model, we show that PSR
J1906+0746 is likely to be an orthogonal rotator ($\alpha \simeq 80^\circ$).
Fitting our polarimetric data to a precession model, we determined the geometry
of the pulsar and found a wide misalignment angle ($\delta = 89_{-44}^{+85}$
deg, 95% C.L.), although the uncertainty is large. Assuming this geometry, we
constructed the beam maps of both magnetic poles.
