An electronic device is provided. The electronic device includes: a first substrate structure and a second substrate structure. The first substrate structure has first overlapping region, first two protruding regions, a second overlapping region, and second two protruding regions. The second substrate structure is disposed opposite to the first substrate structure and includes a main spacer and a sub spacer. The main spacer overlaps the first overlapping region of the first substrate structure. The sub spacer overlaps the second overlapping region of the first substrate structure. The first overlapping region is located between the first two protruding regions, and the second overlapping region is located between the second two protruding regions.