Patent ID: 7877899

Claim:
A shock absorbing device for a shoe sole in a rear foot part, comprising: a support element that supports at least whole of a rear foot part of a foot, the support element having a function of absorbing a shock of landing by undergoing compression deformation due to the shock of landing; deformation elements disposed below the support element in the rear foot part, the deformation elements deforming to be compressed vertically at landing; and outer sole elements contacting a ground at landing, each outer sole element being joined to a bottom surface of the respective deformation element, wherein both the deformation elements and the outer sole elements are substantially separated in a medial-lateral direction and/or a longitudinal direction in the rear foot part to be arranged at least three regions of the rear foot part, a height of each deformation element is set within a range of about 8 mm to about 50 mm, a quotient obtained by dividing an area of a bottom surface of the support element by an area of bottom surfaces of the outer sole elements is set at about 1.3 or more in the rear foot part, each deformation element includes: a bending deformation member that undergoes bending deformation due to the shock of landing; and a compression deformation member that undergoes compression deformation due to the shock of landing to restrain the bending deformation of the bending deformation member, Young's modulus of a material forming the bending deformation member is larger than that of a material forming the support element, Young's modulus of a material forming the compression deformation member is smaller than that of the material forming the bending deformation member, and an elastic proportional limit with respect to a compressive load of the material forming the compression deformation member is larger than that of the material forming the support element.