An array printhead and an inkjet image forming apparatus having the same are include a first member, a second member, a third member, and a support member. The first through third members and the support member sequentially overlap and couple to each other. The first member supplies ink of different colors into the second member and the second member separately receives the ink of different colors supplied from the first member. The third member includes a plurality of head chips that eject ink supplied from the second member thereon and the support member fixes the first member, the second member, and the third member using a plurality of coupling elements.