PURPOSE:To permit an anchor to be removed without occurrence of explosive sound by using a removable anchor with a cavity part formed of a slowly meltable heating material. CONSTITUTION:A cavity part is made up of a heating material 1 having a temperature not fusing a tension member 2 and the tension member 2 is set around the cavity part to form a removable type anchor. The anchor can thus be safely removed without explosive sound or vibration as in the conventional cases because the cavity can be formed by slowly burning and melting the heating material 1.
