PROBLEM TO BE SOLVED: To provide an insole capable of correcting or preventing a 3-arch of a foot from crumbling, and preventing occurrence of plantar fasciitis.SOLUTION: The invention relates to an insole. The insole comprises on a surface of contacting a foot 300: a lateral arch salient part 240； an inside vertical arch salient part 250； and an outside vertical arch salient part 260 for maintaining a 3-arch FA of the foot and comprises on a surface side of a heel part corresponding region 230 corresponding to a heel part 360 of the foot: a recessed plantar fascia protection recess part 270 for protecting a fascia start part 363B of a plantar fascia K extending radially from the vicinity of a calcaneus bulge 363A of a calcaneus 363 of the foot 300.SELECTED DRAWING: Figure 1
