An adhesive of the invention for polarizing plates used for forming an
adhesive layer in a polarizing plate in which a polarizer and a
transparent protective film is are adhering with each other via the
adhesive layer, wherein the adhesive for polarizing plates is an aqueous
solution containing a polyvinyl alcohol-based resin having an acetoacetyl
group and a crosslinking agent, and the aqueous solution has a pH of 4.3
or less. The adhesive of the invention for polarizing plates is good in
durability and long in pot life.