Abstract: An alignment device for vertically aligning adjacent wall panels is adapted to be mounted in the lower corner of a wall panel to engage an identical alignment device and in an adjacent wall panel. The alignment device includes a central, vertical mounting column and a pair of horizontal, spaced and vertically offset alignment ledges extending in front of the lower portion of the mounting column. A horizontal wall panel rear support ledge extends to the rear of the lower portion of the mounting column. The alignment device provides positive vertical alignment with respect to two adjacent wall panels whether such panels are horizontally aligned or positioned angularly with respect to each other about a vertical axis.