  Proton-3He scattering is one of the good probes to study the T=3/2 channel of
three--nucleon forces. We have measured 3He analyzing powers for p-3He elastic
scattering with the polarized 3He target at 70 and 100 MeV. The data are
compared with the theoretical predictions based on the modern nucleon--nucleon
potentials. Large discrepancies are found between the data and the calculations
at the angles where the 3He analyzing power takes the minimum and maximum
values, which are not explained by taking into account Delta-isobar degrees of
freedom.
