A medical adhesive patch includes: a support film including a barrier layer which contains polyvinyl alcohol and a layered inorganic compound, and which is laminated on one surface of a support including polyurethane； an adhesive layer which contains a medicine, and which is laminated on the barrier layer of the support film, a degree of saponification of the polyvinyl alcohol is equal to or more than 70% and equal to or less than 95.5%.
