The invention relates to a strain gauge rosette for internal stress measurement on workpieces according to the bore hole method, comprising within an angular region of 0 - < 180 DEG at least three measurement grids 3, 4, 5 at equal distances and in different directions radially about a centering mark 2. The invention is characterized in that each of the at least three measurement grids 3, 4, 5 is associated with an equivalent measurement grid 6, 7, 8 that is disposed opposite and aligned in the same direction. To this end, all measurement grids 3, 4, 5, 6, 7, 8, 16, 17 have the same radial distance to the central marking 2. The opposing measurement grid pairs 3, 8,4, 7,5, 6,16, 17 of a tensile direction are connected or coupled to each other such that the measuring signals thereof are averaged.