Disclosed herein is a belt for relieving back pain. The belt includes a belt part which is wrapped around a waist of a user, snap buttons which are provided on an inner circumferential surface of the belt part at positions spaced apart, and a support rod coupled to at least one selected from among the snap buttons in such a way that the support rod is oriented perpendicular to the belt part. The support rod includes a cylindrical body that has on an outer circumferential surface thereof snap buttons, and a filler charged into the cylindrical body. The snap buttons of the support rod include snap buttons which are arranged in a longitudinal direction on the cylindrical body so that the support rod can also be horizontally fastened to the belt part.
