To provide a footwear sole insert and footwear that would allow performing the fundamental motion of grasping through regulation and promotion of the formation of a functional fundamental arch line linking the cuneocuboid joint areas at cuboidal bone edges of the foot parts with the second and third MP joint areas thereof to thereby making it possible to basically solve alignment abnormality and functional failure. A sole insert is provided with a raised ridge face brought into contact with the region of the foot part extending from the vicinity of the cuneocuboid joint area at edges of cuboids to the vicinity of the proximal phalanxes at the MP joint area between second metatarsals and third metatarsals so as to elevate the region and hold the same in archlike form.