The present disclosure relates to a manufacturing device of a film patterned retarder for a three dimensional display devices. The present disclosure suggests a device for manufacturing a film patterned retarder comprising: a light source configured to irradiate an ultra violet light to an exposure area; a left polarizer and a right polarizer disposed in neighboring on a same leveled plane within the exposure area; a left pattern mask overlapping with the left polarizer and a right pattern mask overlapping with the right polarizer; and a film roller configured to rotate with a constant speed, to contact a base film on its surface and to move the base film with the constant speed. The manufacturing process is very simple and the cost for manufacturing the film patterned retarder according to the present disclosure is saved.