To provide a multistage pressing device capable of simplifying processes, raising production efficiency, and further attaining space saving by performing a plurality of processes by one device, and a method for forming an object to be formed using the same.

The multistage pressing device is constituted so as to perform press forming of a plurality of objects 8 to be formed collectively at a time by arranging an upper stage pressing die 3 and a lower stage pressing die 4 by arranging them in the perpendicular direction, and closing the upper stage pressing die 3 and the lower stage pressing die 4 in the perpendicular direction at a time. The lower stage pressing die 4 is provided with a caulking device 5 for performing caulking-fixing of a plurality of accessories 81 to the object 8 to be formed.