The invention relates to a portable brush, in particular to a brush convenient to carry with a storage box; the portable brush comprises a handle; the left end of the handle is provided with a storage box, the right end of the storage box is provided with first and second retaining grooves symmetrically in top and bottom, a first bristle plate is mounted at the first retaining groove, a second bristle plate is mounted at the second retaining groove, and the right end of the storage box is provided with a pop cover. By designing the storage box, the storage box may store washing materials, such as leather shoe polish, detergents or soap, and such gathering facilitates carrying; the bristle plates are releasably connected with the storage box, re-purchasing a portable brush is not required after the bristle plates are damaged, usage can be continued just by changing the bristle plates, and resources are saved.