A jointless bridge is provided to improve durability and safety of a bridge by preventing horizontal shear stress from being applied at the top superstructure of a bridge. A jointless bridge comprises: an abutment(10); a mold(20) which is arranged between each first supporting part of the abutment and in which a bottom slab(BS) is placed on the top; an extension slab(ES) arranged at the upper part of the second supporting part of the abutment; a sliding unit located between the second supporting part and the extension slab; and an elastic joint(40) arranged between the holder of the abutment and the extension slab end part. The sliding unit converts relative displacement applied to the extension slab into sliding movement in case the bottom slab and the mold is in elastic deformation.
