A device for manufacturing a membrane-electrode gasket assembly, the device comprising: a first sub-assembly configured to manufacture a membrane-electrode body having a membrane and an electrode catalyst (3,4) being joined to each other; a second sub-assembly provided downstream from the first sub-assembly and being configured to receive the membrane-electrode body from the first sub-assembly; and a third sub-assembly provided downstream from the second sub-assembly, the third sub-assembly being configured to receive the membrane-electrode body from the second sub-assembly and to manufacture an assembly by joining a gasket to the membrane-electrode joined body, wherein the membrane is disposed continuously over the first to third sub-assembly (100,200,300), characterized in that the first sub-assembly comprises: a membrane unwinder configured to supply a film to which the membrane is attached; a first film rewinder provided downstream from the membrane unwinder and being configured to collect the film from the membrane; a first slot die provided downstream from the first film rewinder and being configured to apply a first electrode catalyst to a surface of the membrane; and a first adsorption roller facing the first slot die and being configured to adsorb the membrane; the second sub-assembly comprises: a second moving roller movable along a predetermined trajectory; and a second controller configured to control movement of the second moving roller; and the third sub-assembly comprises a heat-pressing part configured to heat or press the membrane-electrode body. a first sub-assembly configured to manufacture a membrane-electrode body having a membrane and an electrode catalyst (3,4) being joined to each other; a second sub-assembly provided downstream from the first sub-assembly and being configured to receive the membrane-electrode body from the first sub-assembly; and a third sub-assembly provided downstream from the second sub-assembly, the third sub-assembly being configured to receive the membrane-electrode body from the second sub-assembly and to manufacture an assembly by joining a gasket to the membrane-electrode joined body, wherein the membrane is disposed continuously over the first to third sub-assembly (100,200,300), characterized in that the first sub-assembly comprises: a membrane unwinder configured to supply a film to which the membrane is attached; a first film rewinder provided downstream from the membrane unwinder and being configured to collect the film from the membrane; a first slot die provided downstream from the first film rewinder and being configured to apply a first electrode catalyst to a surface of the membrane; and a first adsorption roller facing the first slot die and being configured to adsorb the membrane; the second sub-assembly comprises: a second moving roller movable along a predetermined trajectory; and a second controller configured to control movement of the second moving roller; and the third sub-assembly comprises a heat-pressing part configured to heat or press the membrane-electrode body. a membrane unwinder configured to supply a film to which the membrane is attached; a first film rewinder provided downstream from the membrane unwinder and being configured to collect the film from the membrane; a first slot die provided downstream from the first film rewinder and being configured to apply a first electrode catalyst to a surface of the membrane; and a first adsorption roller facing the first slot die and being configured to adsorb the membrane; the second sub-assembly comprises: a second moving roller movable along a predetermined trajectory; and a second controller configured to control movement of the second moving roller; and the third sub-assembly comprises a heat-pressing part configured to heat or press the membrane-electrode body. a second moving roller movable along a predetermined trajectory; and a second controller configured to control movement of the second moving roller; and the third sub-assembly comprises a heat-pressing part configured to heat or press the membrane-electrode body.