A method of recording and reproducing on an optical recording medium
having a user data area and a lead-out area, wherein the user data area
and the lead-out area each has grooves and lands formed thereon. Wobbles
are formed on at least one lateral surface of grooves of the user data
area and the lead-out area, and configured such that wobble
characteristics are made different between the user data area and the
lead-out area. Different types of wobbles are formed on the grooves of
either the user data area or the lead-out area, thereby preventing an
optical pickup that performs recording/reproduction from deviating from
the user data area. Also, in a multi-layer optical recording medium, a
whole area of a recording layer is configured to have a same condition,
thereby preventing deterioration in reproduction and/or recording due to
a difference in light power transmittance of another recording layer.