An optical information medium comprises a pair of discs which are bonded
to each other, an optical recording layer provided on at least one of the
discs, and a reflecting layer formed on an upper side of the optical
recording layer. The optical information medium further includes an
adhesive for bonding the pair of discs provided on the reflecting layer,
wherein the adhesive has a thickness ranging from 10 to 80 .mu.m. A
protecting layer is provided on the upper side of the reflecting layer
wherein the pair of discs may be bonded by the protecting layer. The
optical recording layer, reflecting layer and protecting layer may be
directly sequentially provided on the disc but another substrate layer
may be inserted between these layers. There is employed, as the adhesive,
those including a reactive curing resin or a hot melt material, and it is
preferable that the shrinkage rate of the adhesive be less than 15%.