A prosthesis foot includes: a connecting unit including a flexible first plate and a leg-connecting member that is connected to the first plate a buffer unit including a flexible second plate that has a front portion connected to and disposed under a front portion of the first plate, and an elastic wedge member that is clamped between the first and second plates to form an acute angle between the first and second plates and a support unit including a flexible third plate that has a rear portion connected to and disposed under a rear portion of the second plate, and an elastic support member that is interposed between the second and third plates to form an acute angle between the second and third plates.
