PURPOSE: To form the title heel part well-fitting and easy to wear, by a method wherein at the title heel part integrally molded of synthetic resin by injection molding, a plurality of horizontal holes, each of whose sectional figure is made in an almost round shape, pierced in horizontal direction are provided, and each of the holes is formed in tapers for which both of the outsides thereof are made in a large diameter and the central part thereof is made in a small diameter.

CONSTITUTION: The whole of a sandal 1 is integrally molded of synthetic resin by injection molding, and is composed of a heel part 2, a sole part 3 and belt parts 4. At the heel part 2, a plurality of horizontal holes 5, each of which is formed in an almost round shape in section, pierced in horizontal direction, are formed in double levels at regular intervals. The horizontal holes 5 may also be formed in different levels with each other or in three levels. Each of the horizontal holes 5 formed on the heel part 2 is formed in tapers for which both of the outsides thereof are made in a large diameter and the central part thereof is made in a small diameter. On the periphery of the sole part 3, the end parts of each of the belt parts 4 are separately connected. A forward belt for the belt parts 4 is made small and a rearward belt therefor is made large, and they are formed in the shape of inclination, and a space part 8 is also formed. In this way, the heel part for excellent footwear well-fitting and easy to wear can be obtained.