In a display manufacturing method including bonding of a light-transmissive substrate onto a display surface of a display body, the bonding includes bending the light-transmissive substrate into an arch-like shape with a bonding surface thereof having a convex shape. An adhesive sandwiched is put between a bonding surface of the display body and a top of a bonding surface of the bent light-transmissive substrate. The bend of the light-transmissive substrate is released while moving two rollers from a center of the light-transmissive substrate in a direction of the bend of the light-transmissive substrate towards both terminal edges of the light-transmissive substrate in mutually reverse directions. The two rollers press a non-bonding surface of the light-transmissive substrate against the display body.