A structure of a permanent anchor comprising: a steel wire fixing part to which tension members for permanent anchoring are fixed; and an anchoring head part coupled to a lower side of the steel wire fixing part and fixed within an anchor hole, wherein and the steel wire fixing part and the anchoring head part are anchored to a leading end within the anchor hole by grout, in the steel wire fixing part, upper and lower guiding parts and including fixing grooves and radially formed on outer peripheries are formed, a winding part extended from the fixing grooves and is protruded downwardly from the lower guiding part in order for the tension members to be inserted and united through the fixing grooves and, a single tension member is united as being bent via the winding part, and a coupling hole is formed at a lower side of the winding part, the anchoring head part includes a pressurizing tube body, a fluid, and anchor wings (60,60'), and the fluid is slid by a filling pressure of grout injected into the pressurizing tube body so as to expand and unfold the anchor wings and to the outside, the steel wire fixing part and the anchoring head part are connected and coupled by a supporting rod including a coupling piece and a hinge-coupling part, the supporting rod and the steel wire fixing part are connected by engaging a fixing pin into a coupling hole for the coupling piece of the supporting rod and the steel wire fixing part, the anchor wings are hinge-coupled through the hinge-coupling part of the supporting rod, the pressurizing tube body is fixed to the supporting rod and the fluid is located within the pressurizing tube body and thus slid as being fit in the supporting rod, a discharge groove part is formed on a lower side of an inner surface of the pressurizing tube body, so that if the fluid is pushed out by grout injected into the pressurizing tube body, the discharge groove part communicates with the inside of the pressurizing tube body so as to discharge the grout inside the pressurizing tube body to the outside through the discharge groove part, on a top surface of the pressurizing tube body, a pipe connection hole is formed to be screw-connected to a grout injection pipe and a cutting board is also formed by a cutting groove, and when a pressure of the grout injected into the pressurizing tube body is increased, the cutting grove is fractured and the cutting board is split and removed to the outside of the pressurizing tube body. a steel wire fixing part to which tension members for permanent anchoring are fixed; and an anchoring head part coupled to a lower side of the steel wire fixing part and fixed within an anchor hole, wherein and the steel wire fixing part and the anchoring head part are anchored to a leading end within the anchor hole by grout, in the steel wire fixing part, upper and lower guiding parts and including fixing grooves and radially formed on outer peripheries are formed, a winding part extended from the fixing grooves and is protruded downwardly from the lower guiding part in order for the tension members to be inserted and united through the fixing grooves and, a single tension member is united as being bent via the winding part, and a coupling hole is formed at a lower side of the winding part, the anchoring head part includes a pressurizing tube body, a fluid, and anchor wings (60,60'), and the fluid is slid by a filling pressure of grout injected into the pressurizing tube body so as to expand and unfold the anchor wings and to the outside, the steel wire fixing part and the anchoring head part are connected and coupled by a supporting rod including a coupling piece and a hinge-coupling part, the supporting rod and the steel wire fixing part are connected by engaging a fixing pin into a coupling hole for the coupling piece of the supporting rod and the steel wire fixing part, the anchor wings are hinge-coupled through the hinge-coupling part of the supporting rod, the pressurizing tube body is fixed to the supporting rod and the fluid is located within the pressurizing tube body and thus slid as being fit in the supporting rod, a discharge groove part is formed on a lower side of an inner surface of the pressurizing tube body, so that if the fluid is pushed out by grout injected into the pressurizing tube body, the discharge groove part communicates with the inside of the pressurizing tube body so as to discharge the grout inside the pressurizing tube body to the outside through the discharge groove part, on a top surface of the pressurizing tube body, a pipe connection hole is formed to be screw-connected to a grout injection pipe and a cutting board is also formed by a cutting groove, and when a pressure of the grout injected into the pressurizing tube body is increased, the cutting grove is fractured and the cutting board is split and removed to the outside of the pressurizing tube body.