A method of manufacturing a liquid crystal display device that prevents a liquid crystal panel from warping into a shape concave to the viewer side. The method including a bonding step including providing sheet-shaped optical members each including a polarizing plate and an adhesive layer or a pressure-sensitive adhesive layer and bonding the sheet-shaped optical members to both surfaces of a rectangular liquid crystal cell with the adhesive layer or a pressure-sensitive adhesive layer. The bonding step includes continuously pressing the optical member from its end to bond the optical member from its end to bond the optical member to the liquid crystal cell, while applying a tension to the optical member and stacking the liquid crystal cell and the optical member.