An inkjet printhead includes a substrate, a nozzle plate (120), and two heaters (108a,108b) and conductors. The substrate includes an ink chamber (106) formed in an upper portion thereof to store ink and a manifold (102) formed in a lower portion thereof to supply the ink to the ink chamber. The nozzle plate includes a plurality of passivation layers (121,122,126) stacked on the substrate and made of insulating materials, a heat dissipation layer (128) stacked on the plurality of passivation layers and made of a thermal conductive metal material, and a nozzle passing therethrough and connected to the ink chamber. The two heaters and conductors are interposed between the plurality of passivation layers of the nozzle plate and symmetric with respect to the nozzle. The heaters heat the ink filled in the ink chamber and the conductors apply current to the heaters. Two ink channels (105a,105b), which are interposed between the ink chamber and the manifold to connect the ink chamber to the manifold, are symmetric with respect to the nozzle.