A support module includes a housing framework, two guide rail units disposed within a receiving space of the housing framework and spaced apart from each other, and a carrier connected between the guide rail units and movable on the guide rail units toward and away from a front opening of the housing framework for carrying a display panel unit. A support assembly which includes a plurality of the support modules juxtaposed to each other, and a display apparatus which includes a display panel unit supported by the support module are also disclosed.