To provide an expansion joint for bridge in which a lifetime of an elastic seal material can be further prolonged than the prior arts.

An expansion joint 100 for bridge comprises a pair of joint main bodies 1, 11 which are disposed in one-side end portions H1 of confronted bridges H, an anchor plate 2 with which the joint main bodies 1, 11 can be mounted strongly to the bridge H, reinforcing-bars 3, 3a, 3b and an elastic seal material 4. In a projecting part 11b of the joint main body 11, a surface 11c at the same side as a side where the elastic seal material 4 is formed, is configured to apply release processing having releasability to the elastic seal material 4.