Abstract: A multifunctional shoe having a self-ventilating system and a shock-absorbing system, includes a ring-shaped heel chamber member disposed in a heel portion of an outsole of the shoe and a squeezing chamber member disposed in the ring-shaped heel chamber member, the heel chamber member and the squeezing chamber member forming a composite structure, whereby the multifunctional shoe can be effectively self-ventilated and shock-absorbed as well as the air powerfulness of the heel chamber can be controlled by a separate air pumping device.