An internal anchorage for removing a tension member of a ground anchor, said internal anchorage comprising: a plurality of wedges divided into at least two more equal parts in the circumference direction, characterised in that the or each of the wedges includes: an inner front part smoothly formed on the upper portion of the inner surface thereof, an engagement teeth formed on a lower portion of the inner surface, a traction jaw for mounting a wedge traction plate formed on the end of the inner front part in the circumference direction, and an external ring groove formed on the upper of the external surface in the circumference direction; a wedge locking ring inserted into the end of the outer surface of the wedge in order to maintain an assembly condition of the wedges; a wedge traction plate inserted into the traction jaw of the wedges and pulling the wedges by the reaction force in releasing the external anchoring, wherein the wedge traction plate includes: a horn screw formed on the upper portion of the center thereof to engage with a screw hole of a cap, and a tension cap formed on the lower portion of the center thereof and having a hexagonal tension member groove for inserting a tension member; a wedge box including a tension member hole formed on the lower end of the inner surface thereof, and a conical wedge seat for seating the wedges, a ring seat formed on the internal surface for seating the wedge locking ring; and a cap screwed in the top end of the wedge box and having a screw hole for engaging with the horn screw of the wedge traction plate. a plurality of wedges divided into at least two more equal parts in the circumference direction, characterised in that the or each of the wedges includes: an inner front part smoothly formed on the upper portion of the inner surface thereof, an engagement teeth formed on a lower portion of the inner surface, a traction jaw for mounting a wedge traction plate formed on the end of the inner front part in the circumference direction, and an external ring groove formed on the upper of the external surface in the circumference direction; a wedge locking ring inserted into the end of the outer surface of the wedge in order to maintain an assembly condition of the wedges; a wedge traction plate inserted into the traction jaw of the wedges and pulling the wedges by the reaction force in releasing the external anchoring, wherein the wedge traction plate includes: a horn screw formed on the upper portion of the center thereof to engage with a screw hole of a cap, and a tension cap formed on the lower portion of the center thereof and having a hexagonal tension member groove for inserting a tension member; a wedge box including a tension member hole formed on the lower end of the inner surface thereof, and a conical wedge seat for seating the wedges, a ring seat formed on the internal surface for seating the wedge locking ring; and a cap screwed in the top end of the wedge box and having a screw hole for engaging with the horn screw of the wedge traction plate. an inner front part smoothly formed on the upper portion of the inner surface thereof, an engagement teeth formed on a lower portion of the inner surface, a traction jaw for mounting a wedge traction plate formed on the end of the inner front part in the circumference direction, and an external ring groove formed on the upper of the external surface in the circumference direction; a wedge locking ring inserted into the end of the outer surface of the wedge in order to maintain an assembly condition of the wedges; a wedge traction plate inserted into the traction jaw of the wedges and pulling the wedges by the reaction force in releasing the external anchoring, wherein the wedge traction plate includes: a horn screw formed on the upper portion of the center thereof to engage with a screw hole of a cap, and a tension cap formed on the lower portion of the center thereof and having a hexagonal tension member groove for inserting a tension member; a wedge box including a tension member hole formed on the lower end of the inner surface thereof, and a conical wedge seat for seating the wedges, a ring seat formed on the internal surface for seating the wedge locking ring; and a cap screwed in the top end of the wedge box and having a screw hole for engaging with the horn screw of the wedge traction plate.