Abstract: Portable, collapsible, adjustable support apparatus is described comprising first and second tubular members which are telescopically connected. A base member including pivoting legs is preferably attached to the lower end of the first tubular member. The second tubular member includes engagement means which is adapted to releasably engage the interior surface of the first tubular member. Release means carried by the second tubular member may be actuated by one hand to raise or lower the second tubular member with respect to the first tubular member. A locking system is also described which is adapted to releasably lock pivotable leg members to a base member. The leg members may be locked in either an upward or downward position.