An adjustable shoe rack includes a support structure, at least one shoes plate, and at least one holding structure. The shoes plate is disposed on the support structure and is at a predetermined distance from a ground. The holding structure is disposed on a bottom face of the shoes plate and includes two clamping structures and a moving structure. The two clamping structures are parallel arranged. Each clamping structure includes a fixed clamping element and a movable clamping element wherein a clamping space is defined therebetween for receiving shoes. The two movable clamping elements are located between the two fixed clamping elements. The moving structure is located between the two movable clamping elements and is able to drive the two movable clamping elements to move toward opposite directions at the same time so as to alternate a width of the clamping space.