A spring member 31 includes side, upper and lower plates 32, 33 and 34 and a cut-out portion 35 on its upper plate 33 for positioning. The upper and lower plates 33 and 34 define an opening. The spring member 31 receives an assembling member or bezel 24 and a rear light unit 2 with the cut-out portion 35 engaged in an upper plate 23 of the bezel 24 and puts them together while a liquid crystal display panel 12 is held between the bezel 24 and the light unit 2. The upper plate 23 of the bezel 24 has a step 25 for positioning of the spring member 31. Due to elasticity of the upper and lower plates 33 and 34 of the spring member 31, the bezel 24 and the light unit 2 are compressively held with a constant distance defined between them by the spring member 31. An optical sheet 11 covers the liquid crystal display panel uniformly. Thus, undulation or crinkles of the sheet 11 hardly take place on the side of a cold cathode fluorescent lamp 7, uneven brightness and distortion of images can be substantially avoided and display dignity is substantially improved.