The present invention provides a production method of a liquid crystal display device, and an exposure device, which can inhibit the deterioration of display quality even when the aligning treatment of an alignment layer is performed using an optical alignment method. The present invention pertains to a production method of a liquid crystal display device in which an alignment layer is provided on a substrate and two or more domains are formed in each pixel of a display region by exposing the alignment layer, wherein the production method includes the exposure step of exposing the alignment layer through a photo mask in which a plurality of light-transmitting areas are located in a stripe pattern, and wherein the exposure step is a step of exposing the alignment layer continuously while the relative position of the photo mask with respect to the substrate is moved at the time of viewing a substrate surface from the front in substantially parallel with the light-transmitting area.