  Theoretical calculations of the interelectronic-interaction and QED
corrections to the $g$ factor of the ground state of boronlike ions are
presented. The first-order interelectronic-interaction and the self-energy
corrections are evaluated within the rigorous QED approach in the effective
screening potential. The second-order interelectronic interaction is considered
within the Breit approximation. The nuclear recoil effect is also taken into
account. The results for the ground-state $g$ factor of boronlike ions in the
range $Z$=10--20 are presented and compared to the previous calculations.
