To make it possible to walk on tiptoe at the time of walking with slippers and to prevent the walking with the tendency to slide without lifting one's feet by providing a slipper sole structure which allows the easy exchange of the thickness of the projecting parts to be pressed to plantar aches in order to correct and prevent a flatfood, provides comfortability in wearing and is hygienic.

This slipper sole structure consists basically of an outsole 1, an insole 2 and covering cloth 3 to cover the tops thereof. Rubber cloth 7 is joined in a plantar arch projecting part 4 which is semicircular in a plane shape, is approximately trapezoidal in a sectional shape and is used by selecting one among plural kinds varying in heights and the plantar arch part of the insole 2 so as to meet the plane shape of the shank projecting part 4. The plantar arch projecting part 4 is made housable between the rubber cloth 7 and an opening/closing part 6 and the insole 2. The structure has a housing and fixing part 5 where the plantar arch projecting part 4 is made fixable by the expanding and stretching force of the rubber cloth 7 and the opening/ closing part 6 which exists outside the housing and fixing part 5 makes the free insertion and ejection of the plantar arch projecting part 4 from laterally and prohibits the transverse movement of the plantar arch projecting part 4 at the time of housing.