Abstract: Method of manufacturing, in one piece, forged connecting rods. The method includes cutting blanks from a bar. Each blank is worked in several steps, until it assumes its final shape. During the various working steps, a groove made in each blank is caused to spread out in a predetermined manner and finally forms a fracture initiation (44), in the area (38) through which bolt holes are drilled for the bearing cap mounting bolts. After final working, the remaining portions of the core portion (10, 46, 50) are divided by a slight separating force, thus providing in the fracture surface the required guidance for remounting the bearing cup on the upper bearing.