A packing device includes a base frame, a rear frame and a front pillar. Glass plates (G) are disposed on the base frame with the glass plates leaned against the rear frame. The glass plates (G) are held by a pressing device with the glass plates (G) pressed toward the rear frame. The pressing device has pressing members to be arranged along front both sides of the glass plates (G), and locking members each removably disposed between the pressing member and the front pillar. The locking member disposed between the front pillar and the pressing member is pressed downwardly along the front pillar to be disposed between the front pillar and the pressing member with the locking member engaged therebetween, whereby the pressing member presses a front surface of the glass plates (G). According to this packing device, packing and unpacking operations of glass plates (G) can be simply and assuredly performed while attaining structural simplification and cost reduction.