An information recording carrier in one mode has minute pattern including
plural grooves or lands formed in parallel and adjacent each other and
comprises a supporting body having the minute pattern, a recording layer
formed on the minute pattern, and a light transmission layer formed on
the recording layer. The minute pattern is formed under a relation of
p<.lamda./NA, where a pitch of each groove or land is P, a wavelength
of a laser beam is .lamda. and a numerical aperture of an objective lens
is NA. The plural grooves or lands have at least a wobbling region where
data is recorded wobblingly by frequency shift modulation. A phase
relation between the high and the low frequency portion composing the
frequency shift modulation is .+-.(.pi./2.5) and the high and the low
frequency portion are continuous in phase at a border between the high
and the low frequency portion.