A method of transferring a catalyst layer (20, 22) using a jig having a positioning member and a holding member, wherein the positioning member includes a frame-like inner wall and a bottom portion attached to the inner wall, the method comprising: a process of forming a multi-layer body by stacking base materials (30, 32) and an electrolyte film on one another such that catalyst layers (20, 22) formed on the base materials (30, 32) are brought into contact with the electrolyte film; a process of pressing the multi-layer body from a stacking direction; a process of heating the multi-layer body to a first temperature; and a process of stopping the heating after a predetermined time passes from when pressing is started, wherein the process of forming a multi-layer body comprises positioning the base materials (30, 32) and the electrolyte film to be stacked as the multi-layer body using the frame-like inner wall of the positioning member of the jig such that the base materials (30, 32) and the electrolyte film are arranged at the same position when seen from the stacking direction, wherein the inner wall has a shape that coincides with the outer shapes of the electrolyte film and the base materials (30, 32) within a predetermined error margin and plays a role of a guide during stacking of the electrolyte film and base materials (30, 32), wherein an end of the inner wall is closed by the bottom portion in the stacking direction; and wherein the process of pressing the multi-layer body comprises holding the multi-layer body from the stacking direction, and transmitting pressing force caused by an independent pressing apparatus to the multi-layer body using the holding member of the jig, characterized by a process of stopping pressing when the temperature of the catalyst layers (20, 22) becomes a second temperature or lower, which is a temperature lower than the first temperature, after the heating has been stopped, wherein the first temperature is set to be in a range of higher than or equal to 100°C to a temperature of a softening point of the electrolyte film, and wherein the second temperature is set to be a temperature higher than room temperature. a process of forming a multi-layer body by stacking base materials (30, 32) and an electrolyte film on one another such that catalyst layers (20, 22) formed on the base materials (30, 32) are brought into contact with the electrolyte film; a process of pressing the multi-layer body from a stacking direction; a process of heating the multi-layer body to a first temperature; and a process of stopping the heating after a predetermined time passes from when pressing is started, wherein the process of forming a multi-layer body comprises positioning the base materials (30, 32) and the electrolyte film to be stacked as the multi-layer body using the frame-like inner wall of the positioning member of the jig such that the base materials (30, 32) and the electrolyte film are arranged at the same position when seen from the stacking direction, wherein the inner wall has a shape that coincides with the outer shapes of the electrolyte film and the base materials (30, 32) within a predetermined error margin and plays a role of a guide during stacking of the electrolyte film and base materials (30, 32), wherein an end of the inner wall is closed by the bottom portion in the stacking direction; and wherein the process of pressing the multi-layer body comprises holding the multi-layer body from the stacking direction, and transmitting pressing force caused by an independent pressing apparatus to the multi-layer body using the holding member of the jig, characterized by a process of stopping pressing when the temperature of the catalyst layers (20, 22) becomes a second temperature or lower, which is a temperature lower than the first temperature, after the heating has been stopped, wherein the first temperature is set to be in a range of higher than or equal to 100°C to a temperature of a softening point of the electrolyte film, and wherein the second temperature is set to be a temperature higher than room temperature.