A footwear sheet (30, 130, 230, 330, 430, 530) to be in contact with the sole surface of a wearer wearing a footwear, comprising: a sheet-like base part with side surfaces comprising a sole-side surface and an opposite-side surface and with a side-surface shape; and a pressure-applying part projected from the opposite-side surface that is a side surface of the side surfaces of the sheet-like base part opposite the sole-side surface, the pressure-applying part being formed in a planar shape smaller than that of the sole surface of the wearer, the pressure-applying part being indirectly in contact with a portion of the sole surface of the wearer with the sheet-like base part in between such that pressure on the portion of the sole surface of the wearer is higher than pressure on the pressure-applying part; wherein the pressure-applying part comprises: a plantar aponeurosis pressure-applying portion placed at a position corresponding to at least a portion of the plantar aponeurosis of the wearer; and a joint pressure-applying portion (52, 53) placed at least at a position corresponding to a joint connecting the fifth proximal phalanx and the fifth metatarsal of the wearer or at a position corresponding to at least a portion of the Chopart's joint of the wearer, wherein the side-surface shape of the sheet-like base part is set to be in a shape in which the sheet-like base part is convexly curved toward an upward-downward direction so that a portion of the sheet-like base part corresponding to a plantar aponeurosis of the wearer is located at the highest position. a sheet-like base part with side surfaces comprising a sole-side surface and an opposite-side surface and with a side-surface shape; and a pressure-applying part projected from the opposite-side surface that is a side surface of the side surfaces of the sheet-like base part opposite the sole-side surface, the pressure-applying part being formed in a planar shape smaller than that of the sole surface of the wearer, the pressure-applying part being indirectly in contact with a portion of the sole surface of the wearer with the sheet-like base part in between such that pressure on the portion of the sole surface of the wearer is higher than pressure on the pressure-applying part; wherein the pressure-applying part comprises: a plantar aponeurosis pressure-applying portion placed at a position corresponding to at least a portion of the plantar aponeurosis of the wearer; and a joint pressure-applying portion (52, 53) placed at least at a position corresponding to a joint connecting the fifth proximal phalanx and the fifth metatarsal of the wearer or at a position corresponding to at least a portion of the Chopart's joint of the wearer, wherein the side-surface shape of the sheet-like base part is set to be in a shape in which the sheet-like base part is convexly curved toward an upward-downward direction so that a portion of the sheet-like base part corresponding to a plantar aponeurosis of the wearer is located at the highest position. a plantar aponeurosis pressure-applying portion placed at a position corresponding to at least a portion of the plantar aponeurosis of the wearer; and a joint pressure-applying portion (52, 53) placed at least at a position corresponding to a joint connecting the fifth proximal phalanx and the fifth metatarsal of the wearer or at a position corresponding to at least a portion of the Chopart's joint of the wearer, wherein the side-surface shape of the sheet-like base part is set to be in a shape in which the sheet-like base part is convexly curved toward an upward-downward direction so that a portion of the sheet-like base part corresponding to a plantar aponeurosis of the wearer is located at the highest position.