A coating device according to an aspect of the present invention includes a travel module that causes a strip-shaped sheet to travel in a longitudinal direction, a coating module that coats a surface of the strip-shaped sheet with ink while the strip-shaped sheet travels, and a supply module that supplies the ink to the coating module. The coating module includes a slot-type coating head that is disposed above the strip-shaped sheet so as to span the strip-shaped sheet in a width direction. The slot-type coating head includes an ink storage part that widens toward the strip-shaped sheet in cross-sectional view and an ink supply path that communicates with an upper part of the ink storage part.