The invention relates to a calibrating plate for an extrusion die for producing plastic profiles, comprising a substantially plate-shaped basic body (21), in which an opening (22) for guiding and calibrating the plastic profile (23) to be produced is provided, with at least one insert part (1) made of a material with high hardness being inserted into the basic body (21), which insert part comprises at least one holding section (2) and a shaping section (3), with both the holding section (2) as well as the shaping section (3) being formed partly as cylindrical surfaces with generatrices parallel to the extrusion axis (6), and with the insert part (1) being held in the axial direction in the plate-shaped basic body (21) by a delimiting stop (5). A longer service life and a simpler adjustment can be achieved in such a way that the holding section (2) comprises a groove (4) which extends in the direction of extrusion (6a), and that the delimitation stop (5) is arranged at one end of the groove (4), which stop protrudes from the groove (4).