A camshaft adjusting device for an internal combustion engine including: a vane-type adjuster actuable by a pressure medium and which is rotationally fixed to a camshaft by a rotor and rotationally fixed to a crankshaft by a stator; a central valve has a displaceable valve body, by which a pressure medium is fed to the vane-type adjuster via a pump from a reservoir, the medium being selectively introduced into different working chambers and fed back from other working chambers to the reservoir, depending on the position of the valve body. The device includes a rolling bearing, by which the end section of the camshaft facing the vane-type adjuster is mounted in relation to a fixed housing wall. An axially oriented through-flow opening extends through the rolling bearing through which the pressure medium delivered by the pressure flows in an axial direction to the central valve.