It is an object of the present invention to provide an information
recording method for recording information in a data rewritable type
optical recording medium having a plurality of information recording
layers, which can form recording marks having good shapes. In the
information recording method according to the present invention,
information is recorded in an optical recording medium 10 having at least
a stacked L0 layer 20 and L1 layer 30 by projecting a laser beam whose
power is modulated thereonto via a light incidence plane 13a. When
information is recorded, .lamda./NA is set to be equal to or shorter than
700 nm, where .lamda. is the wavelength of the laser beam and NA is the
numerical aperture of an objective lens for converging the laser beam,
and a pulse width T.sub.top0 of a top pulse of the laser beam when
information is to be recorded in the L0 layer 20 is set to be shorter
than a pulse width T.sub.top1 of a top pulse of the laser beam when
information is to be recorded in the L1 layer 30.