To provide a positioning device for a blank material which can position a blank material in a simple and accurate manner without being limited to the shape and size of the blank material.

A positioning device for a blank material 11 includes a mounting frame 13 on which a blank material B1 is mounted, and a plurality of positioning units 21 each having a positioning pin 23. The mounting frame 13 has a plurality of spaces 13a through which the positioning pins 23 can be moved. The front end of each of the positioning pins 23 is protruded above the mounting frame 13 through the space 13a in the mounting frame 13. Each of the positioning units 21 is arranged at a position that faces each of the positioning pins 23. Each of the positioning units 21 has a servo motor 24 as a drive source for moving each of the positioning pins 23.