Medical pressure-sensitive adhesive sheets having a pressure-sensitive
adhesive layer on at least one side of a support so as to have an
appropriate tack strength and acceptable processability. The
pressure-sensitive adhesive layer is formed with a pressure-sensitive
adhesive composed mainly of an acrylic polymer and a compatible component
that is compatible with the acrylic polymer. The support layer contains a
compatible component that is compatible with the acrylic polymer. The
amount of the compatible component contained in the support layer is 70%
or less of the amount of the compatible component contained in the
pressure-sensitive adhesive layer and the support layer has an elongation
of 200% or more without containing any compatible component.