A sandal includes a footwear body, one affixing strap and an illumination arrangement. The footwear body has top surface, a bottom surface, and a plurality of light cavities formed on the top surface of the footwear body. The affixing strap has a plurality of light admissible end portions and a body portion extended between the light admissible end portions, wherein the light admissible end portions are mounted in the light cavities respectively. The illumination arrangement is provided in the footwear body, and includes a plurality of illumination units mounted in the light cavities of the footwear body to generate illumination toward the light admissible end portions of the affixing strap respectively for illuminating the sandal in a predetermined illumination pattern.