An anchoring fitting for anchoring in a workpiece, wherein the anchoring fitting includes a tie rod to be arranged in a connecting recess of the workpiece and a buttress body to be arranged in a buttress recess of the workpiece communicating with the connecting recess, wherein the buttress body includes an insertion receptacle for inserting an insertion section of the tie rod along an insertion axis and a support surface arrangement for support on the buttress recess of the workpiece, wherein at least one support surface of the support surface arrangement extends, transversely to a longitudinal axis of the tie rod inserted into the insertion receptacle, so that the tie rod is supported with respect to its longitudinal axis on the buttress recess, wherein the anchoring fitting includes a clamping body for clamping the insertion section of the tie rod in the insertion receptacle.