We have measured the spin-dependent nanometer-sized displacements of the spin Hall effect of the reflected light from a planar air–glass interface. In the case of the vertical polarization, the displacement is found to increase with the incident angle and subsequently decrease after $\sim 48\mathrm{deg}$ , while in the case of the horizontal polarization, it changes rapidly near the Brewster angle. For a fixed incident angle of $30\mathrm{deg}$ , the displacement decreases to zero as the polarization angle approaches $\sim 39\mathrm{deg}$ from $0\mathrm{deg}$ (the horizontal polarization) and then increases in the opposite direction until $90\mathrm{deg}$ (the vertical polarization).