TWI620992B

Provided is a light exposure technology capable of stably forming images across an entire light exposure surface of a substrate, using a simple configuration. The light exposure device which exposes a flexible, belt-shaped substrate (S) comprises: two holding sections (20) formed using a light-transparent member, having transparent sections having flat surfaces, and comprising a first holding section (20a) and a second holding section (20b) that are capable of holding the substrate by using each flat surface; a first movement unit (50) that moves the two holding sections (20) in the approaching direction and the receding direction; a first light exposure unit (30) fixed in position on the first holding section (20a) side; a second light exposure unit (40) arranged on the second holding section (20b) side; and a second movement unit (60) that relatively moves the two holding sections and the two light exposure units, in a substrate-held state. The light exposure device maintains a set distance between each fla