A valve 25 includes: a passage 33 having a first passage 31 which communicates an atmosphere-communicating passage 24 and outside of a cartridge body 10, and a second passage 32 which branches from the first passage; an electrode 35 provided on a wall surface forming the second passage 32; an electrode 37 provided on a wall surface of a bottom wall 11d forming the first passage 31; a driver IC 44 which applies a predetermined voltage selectively to one of these two kinds of electrodes 35, 37; an insulating film 36 provided on a surface of the electrode 35; and an insulating film 38 provided on a surface of the electrode 37. Accordingly, there is provided a valve which is capable of opening and closing a passage communicating two spaces separated from each other, which has no movable part, and which has a simple construction.