An adjustable support apparatus for an LCD monitor is provided. The support apparatus includes a receiving bracket, a cover secured to the receiving bracket, and a sliding member received between the receiving bracket and the cover. The sliding member is capable of sliding relative to the receiving bracket and the cover. A securing member is slidably attached to the cover. An elastic positioning member is secured to the cover. A plurality of positioning grooves is defined in the sliding member, and the securing member biases the positioning members to engage in one of the positioning grooves.