The magnetic alignment of poly(L-lactic acid) (PLA) containing octamethylenedicarboxylic dibenzoylhydrazide (OMBH) as a nucleating agent was studied. OMBH also affected PLA as a nucleating agent when about 5 wt % of d-type material was included. The magnetic alignment of PLA including OMBH was achieved. The c axis of the PLA was parallel to the magnetic field.