A magnetooptical recording apparatus is disclosed which is capable of performing real-time overwrite operation. The apparatus comprises a laser beam (3) and focusing parts (4) thereof and a pulse magnetic field generator device (6) provided on both sides of a magnetooptical recording medium (1) respectively. The laser beam (3) and focusing parts (4) thereof are formed of an objective lens (5) connected to a moving coil (8) which is provided in a magnet (7), thus the objective lens (5) is movable relative to a magnetic layer (1A) of the magnetooptical recording medium (1) by the interaction between the magnet (7) and the moving coil (8). The magnet (7) generates and applies a D.C. magnetic field of one polarity perpendicular to the magnetic thin film (1A) around a point (P) where the laser beam (3) is focused. While the pulse magnetic field generator device (6) generates pulse magnetic field of the opposite polarity modulated by information signal around the point (P) where the laser beam (3) is focused. Thus one and opposite polarity magnetic field pulse row obtained by a sum of the D.C. magnetic field and the pulse magnetic field is applied to the magnetic thin film (1A) upon laser beam (3) irradiation to perform the real-time overwrite operation.
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