A fabric for a horizontal belt filter includes a two-layer structure in which an upper-surface-side weft forming an upper-surface-side layer and a running-face-side weft forming a running-face-side layer are woven together by a warp. An upper-surface-side surface of the fabric includes a warp long crimp portion of a warp which passes over four or more continuous upper-surface-side wefts; and a warp latent portion which passes under one to four upper-surface-side wefts. At least a part of the warp latent portion passes under one or two running-face-side wefts to weave together the upper-surface-side layer and the running-face-side layer. The warp long crimp is formed on the upper-surface-side surface, and a weft long crimp is formed on a running-face-side surface. The fabric exhibits a good peeling property of a treated matter and which is superior in a cleaning property, rigidity, running stability, and wear resistance.