[en] The energy spectra and angular distributions of photoprotons from the ¹²C(γ, p)¹¹B reaction have been measured at seven angles simultaneously, using 30 MeV bremsstrahlung. The giant dipole resonance peaks at 22.5 MeV, and reaches an absolute cross section value of 13.1 +- 0.8 mb. The anisotropy parameter a₂ from the Legendre polynomial expansion of the angular distributions has an average value of about - 0.55, but shows structure some especially around 25 MeV. On the other hand, the asymmetry coefficient a₁ is always positive and rises slowly with energy. Discussion of all coefficients leads to the conclusion that, although the photonuclear absorption mechanism in ¹²C leading to photoproton emission is dominated by the E1 component, a nonnegligible E2 contribution (about 2%) might be present. A recent coupled-channel calculation by Birkholz satisfactorily describes our results