The purpose of the present invention is to provide a hydrous adhesive skin patch which contains lidocaine and can be applied in a uniform thickness easily. This hydrous adhesive skin patch comprises a support and an adhesive agent layer arranged on the support, wherein lidocaine or a pharmacologically acceptable salt thereof, a hydrophilic adhesive agent, and diethylene glycol or a diethylene glycol monoalkyl ether are contained in the adhesive agent layer. The diethylene glycol monoalkyl ether is preferably at least one compound selected from the group consisting of diethylene glycol monomethyl ether, diethylene glycol monoethyl ether and diethylene glycol monobutyl ether.
