Abstract: A portable table assembly for a hand-held portable circular saw of the kind having a base plate and a motor rotated circular saw blade. A boxlike saw table has a substantially planar horizontal top pendently supporting the portable circular saw therebeneath with the blade rising up through a slot in the table top. The upstanding opposite sides of the upstanding rectilinear base of the table supports opposite edges of the table top. A boxlike, open bottom, back-up table is positionable behind the saw table for guiding portions of a workpiece cut by the saw and includes a horizontal top and upstanding rectilinear base with opposite sides supporting opposite edges of the top. Common, separable, knockdown leg units support both tables for use. The back-up table is invertable to nest the saw table therein and therewith to define a storage compartment sized to receive the knocked-down leg units for storage and transportation.