A camshaft adjuster (1) for internal combustion engines has a central tensioning screw (9) for fixing the adjuster (1) in relation to a camshaft (2). A slide (8) controls the supply of the pressure medium to the camshaft adjuster (1) being integrated into the tensioning screw (9). The tensioning screw (9) forms the mounting of the camshaft adjuster (1) in relation to the camshaft (2).