Abstract: A modular screen partition system includes a mounting post containing inserts which permit the joining of any desired number of partitions to the post while permitting complete angular orientation capability in a light- and sound-proof assembly. The inserts, located within the top and bottom interior of the mounting post are retained by means of a plug preventing lateral movement and a post to which a cover cap is secured. A bolt associated with each insert is engaged by a mounting track provided at each side edge of the screen partition.