The invention relates to a connecting rod, in particular for a power engine, with a head region (303), a middle region (305) and a base region, wherein the head region has a first connection with a bulge for connecting a piston rotatably about the pivot axis to a connecting rod receptacle of the piston having an undercut corresponding to the bulge and the base region has a second connection for receiving a crankshaft and the head region is connected to the base region via the central region. The invention also relates to a piston, a crank mechanism and an internal combustion engine.

The invention relates to a connecting rod, in particular for a power engine, with a head region (303), a middle region (305) and a base region, wherein the head region has a first connection with a bulge for connecting a piston rotatably about the pivot axis to a connecting rod receptacle of the piston having an undercut corresponding to the bulge and the base region has a second connection for receiving a crankshaft and the head region is connected to the base region via the central region. The invention also relates to a piston, a crank mechanism and an internal combustion engine.