PURPOSE: To obtain a pressure-sensitive adhesive sheet excellent in the adhesion of the support film to the pressure-sensitive adhesive layer without using any anchoring agent and without the necessity for steps and apparatus for its mixing, application, etc., and for performing a corona discharge treatment.

CONSTITUTION: This pressure-sensitive adhesive sheet is prepared by forming a pressure-sensitive adhesive layer on a film made of a flexible vinyl chloride resin, wherein the film is one containing 100 pts.wt. flexible vinyl chloride resin and 0.5-1.9 pts.wt. metallic heat stabilizer.