An adjustable roller shade bracket comprising a first plate, a second plate and a bracket member. The bracket member is adapted for mounting to a surface. The second plate is rotationally secured to the bracket member. The first plate is releasably securable to an end of a roller tube of a roller shade and slidably secured to the second plate such that the first plate may be slid along the second plate in a first plane. Rotation of the second plate about the bracket member through 90 degrees permits the first plate to be slid along the second plate in a plane perpendicular to the first plane.