ABSTRACT: The planes of the two benzene rings in the mol-ecule of the title compound, C(13)H(11)BF(2)O(3), form a dihedral angle of 76.06 (3)°; the C-O-C-C torsion angle characterizing the conformation of the central link of the mol-ecule is -79.20 (1)°. The dihydroxy-boron group is not coplanar with the benzene ring bonded to the B atom; one of the C-C-B-O torsion angles is 32.39 (2)°. One of the OH groups of the boronic acid fragment is engaged in an intra-molecular hydrogen bond, whereas the second OH group participates in inter-molecular hydrogen bonding, which leads to the formation of centrosymmetric dimers.