Provided are an electrochromic display device and a method of manufacturing the electrochromic display device, the electrochromic display device, including: a first substrate and a second substrate facing each other; an electrochromic layer interposed between the first substrate and the second substrate; and a sealing part provided in a continuous ring-like shape on the first substrate or the second substrate and intended for sealing the electrochromic layer. Thus, production efficiency can be increased, and production costs can be reduced.