A circuit board storage bag and a storage rack are disclosed. A plurality of printed circuit board storage bags for accommodating a circuit board comprise a front surface portion and a rear surface portion opposed to the obverse and reverse surfaces, respectively, of the circuit board accommodated in the circuit board storage bag and connecting portions for connecting the front surface portion and the rear surface portion. The front surface portion and the rear surface portion bend at the connecting portions to open and close the circuit board storage bag for use in transporting the circuit board. The circuit boards are stored in a storage rack having an inclined mounting surface for mounting the storage bags and a bag stopper at the lower end of the mounting surface. The bags are stored in vertical position on one side at the lower end of the mounting surface.