Abstract: A clamp assembly for adjustably mounting a video monitor or CPU to a supporting table which is tiltable out of a horizontal plane includes a pair of main clamp members which may be slid onto the table to hook around and extend between the front and rear edges of the table and a pair of angular cross clamp members threadably and adjustably attached between the main clamp members. The cross clamp members are adapted to be initially slid apart from one another a distance sufficient to allow a monitor to be placed therebetween and over the main clamp members. The cross clamp members are then slid toward one another and into engagement with the front and rear edges above the monitor base and tightened in position to hold the monitor against inadvertent sliding movement as a result of tilting of the table. The entire clamping assembly may be mounted and utilized without cutting, drilling, or in any other way disturbing the integrity of the table top.