A cleaning body includes: a shaft portion; and a porous member that is mounted to an outer periphery of the shaft portion at an incline with respect to an axial direction of the shaft portion, and in which plural cavities are formed, wherein the porous member has projecting portions that project toward a radial direction outer side of the shaft portion in a cross-section along the axial direction of the shaft portion, and the projecting portions contact a body to be cleaned and clean the body to be cleaned, and lengths, along a radial direction of the shaft portion, of the plural cavities are longer than lengths along the axial direction of the shaft portion.