A midsole for a shoe comprising an upper midsole and a lower midsole, and further comprising a reinforcing member being embedded in between the upper midsole and the lower midsole. The reinforcing member includes a foot-shaped reinforcing plate and a plurality of wings being repeatedly rounded alternately upwards and downwards, and a plurality of grooves being formed on both sides of a bottom surface of the upper midsole, and a plurality of ribs forming both sides of the lower midsole, in which the ribs correspond to the wings of the reinforcing member and the wings are exposed to the outside of the midsole. The midsole disperses shock and allows for an easy walking motion.