A liquid crystal display includes: a first substrate and a second substrate; a liquid crystal layer filling between the first substrate and the second substrate; and a plurality of sealant observation windows arranged on the second substrate, wherein each sealant observation windows is an enclosed pattern formed by smooth curve; and a sealant covering a portion of sealant observation windows and surrounding the liquid crystal layer to bond the first substrate and the second substrate. In the present invention, those sealant observation windows can avoid the condition of unequal cell gap and increase the convenience of monitoring the spreading condition of the sealant.