An array substrate and a display device are provided. The array substrate includes: a base substrate; and first leads, third leads, and second leads connecting the first leads and the third leads on the base substrate. The base substrate includes a second region corresponding to a sealing material, a sealed first region, and a third region provided on a side of the second region away from the first region. The first region includes the first leads; the second region includes the second leads; and the third region includes the third leads. The area ratio of two adjacent third leads is greater than that of corresponding two adjacent first leads.