The present disclosure relates to the technical field of fixation of light guide plates, and in particular discloses an elastic fixing member for fixing a light guide plate, a backplane for use in conjunction therewith, and a liquid crystal display device comprising both. The elastic fixing member comprises: a body part and a self-fixation part, wherein the self-fixation part is configured to fix the elastic fixing member on a backplane in use. Correspondingly, the backplane comprises: a base and a side wall. Furthermore, a fixing structure and a mounting guide structure are arranged on the side wall of the backplane. The fixing structure is configured to maintain the fixation of the elastic fixing member on the backplane together with the self-fixation part of the elastic fixing member in use, and the mounting guide structure is configured to guide the elastic fixing member in use to fix it on the backplane. The elastic fixing member according to embodiments of the present disclosure has advantages such as high accuracy, high reliability, low cost and easy assembly, and facilitates reliable fixation of the light guide plate.