Abstract: A cup-like insole includes a body of elastic material having a bottom surface which has a shape to fit to a bottom member of a shoe. The insole has a flat portion and a concave side wall portion formed integrally therewith extending from the area corresponding to the inner arch portion of the foot to the area corresponding to the outer lateral side of the foot through the area corresponding to the heel portion of the foot. An impact cushioning material has bouncing putty and is disposed on the upper surface of the side wall. A sheet made of either woven fabrics, unwoven fabrics, or leather covering over the impact cushioning material secures the material to the body. The cup-like insole, according to the invention, provides improved fitness of the heel portion of a shoe to stabilize the heel of the wearer.