To provide a shoe arch part supporting inner sole capable of following motion of a foot in a walk, stably supporting weight, providing favorable feel of wearing, and securely supporting weight by a wide range of the whole arch of the foot including a fifth metatarsal bone tuberosity and a foot arch center cross sectional surface continuous with it on the inner side of it for reducing damage on the foot.

This shoe arch part supporting inner sole l comprises a flat thin plate part 1a in a vertically long rectangular form comprising hard material for totally getting in contact with a part of a foot bottom (f) before a heel bone to a narrow bottom part (g) of a first metatarsal bone, and a downward protruded rectangular base seat part 1b laterally extended from a position of a lower side surface of the thin plate part 1a roughly close to a center outer end in a vertically long direction to a position before an inner side end for securely supporting a fifth metatarsal bone tuberosity (h) of a foot bottom and a foot arch center cross sectional surface (i) continuous with it on the inner side of it.