Patent ID: 7483737

Claim:
An electrode device comprising: a cup-like support integrally including a cup part defining a recess and an outer flange surrounding an outer periphery of said cup part over a circumference thereof; and a sheet-like support integrally including an inner part having an area corresponding to said cup-like part and an outer part surrounding an outer periphery of said inner part over a circumference thereof, said cup-like support and said sheet-like support being designed such that said outer flange and said outer part are superimposed with each other in such a manner as to be surface contacted with each other, thereby defining a chamber for receiving a medicine holding layer containing an electrolyte at said cup part that is located on an inner side, one of said cup-like support and said sheet-like support being provided with an electrode layer extending from inside said chamber to outside said chamber, said electrode device comprising the following respective features; A. at least a place, where said electrode layer is formed, of the superimposing part between said outer flange of said cup-like support and the outer part of said sheet-like support, wherein said place is in a non-joined state, and B. at least one of said outer flange and said outer part which are superimposed with each other is provided with a leakage prevention means in order to prevent a liquid, which flows out of said medicine holding layer loaded in said chamber, from leaking through a gap occurrable at said place in said non-joined state.