A patch comprising a support layer and an adhesive agent layer, wherein the adhesive agent layer contains diclofenac or a pharmaceutically acceptable salt thereof, glycerin, butyleneglycol,and poly(ethyleneglycol) monooleate, and a mass ratio between the butylene glycol and the poly(ethylene glycol) monooleate (mass of butylene glycol:mass of poly(ethylene glycol) monooleate) is 1:1 to 4:1.
