To retrieve the arch of the foot by sustaining the inner lengthwise arch, outer lengthwise arch and side arch of the foot by means of a longitudinal convex lens curved surface put inside the bottom of the shoe, with the partitions of the first, second outer edge, inner edge and rear edge.

The longitudinal convex lens curved surface article is shaped out by lines such as, a first front edge 1 gained by cutting off the front part of a first inner toe joint 8a, a second front edge 2 making a gentle curve gained by cutting off from the part touching the head of a second inner toe bone 7b to the head of a fourth inner toe bone 7d, a first outer edge 3 making a concavity arch forming two outward-warped lines gained by cutting off from the head of the fourth inner toe bone 7d to the forefront of a cubical bone 7f, a second outer edge 4 gained by cutting off the fore-front of the cubical bone 7f to the rear end of the heel outer side, and finally an inner edge 5 and a rear edge 6. The longitudinal convex lens curved surface article is respectively put onto the inner bottom of the shoes so as to sustain the inner outer lengthwise arch and side arch, thus the arches of the foot are well retrieved.