An apparatus for camshaft timing adjustment, comprising: - a drive disc and a hub rotationally supported relative to each other and defining a common rotational axis wherein the hub is arranged within the drive disc or vice versa, - a vane being accommodated in an adjusting chamber defined by the drive disc and/or the hub and separating the adjusting chamber into a first sub-chamber and a second sub-chamber, wherein the vane is attached to the hub or the drive disc, - a hydraulic pump having a high pressure pump chamber, a low pressure pump chamber and a pumping means for pumping a hydraulic fluid from the low pressure pump chamber to the high pressure pump chamber, each pump chamber (101, 102) being fluidly connected to the first sub-chamber and the second sub-chamber and being arranged within the hub, and - a valve assembly comprising a valve actuating means, wherein - the valve assembly is arranged within the hydraulic pump and has - a first state for enabling a flow of the hydraulic fluid from the second sub-chamber to the first sub-chamber and - a second state for enabling a flow of the hydraulic fluid from the first sub-chamber to the second sub-chamber, - the hydraulic pump has a stator and a rotor, the pumping means being supported by the stator or the rotor and configured for pumping the hydraulic fluid from the low pressure pump chamber to the high pressure pump chamber due to a rotation of the rotor relative to the stator, - the stator is integral with and/or torque-proof connected to the hub and/or the pumping means is supported by the rotor, characterized in that - the stator comprises an internal gear being attached to the hub and the rotor comprising a rotor body being disposed within the internal gear and supported rotationally about the common rotational axis such that teeth of the internal gear and peripheral surface sections of the rotor body abut to form a radial bearing. - a drive disc and a hub rotationally supported relative to each other and defining a common rotational axis wherein the hub is arranged within the drive disc or vice versa, - a vane being accommodated in an adjusting chamber defined by the drive disc and/or the hub and separating the adjusting chamber into a first sub-chamber and a second sub-chamber, wherein the vane is attached to the hub or the drive disc, - a hydraulic pump having a high pressure pump chamber, a low pressure pump chamber and a pumping means for pumping a hydraulic fluid from the low pressure pump chamber to the high pressure pump chamber, each pump chamber (101, 102) being fluidly connected to the first sub-chamber and the second sub-chamber and being arranged within the hub, and - a valve assembly comprising a valve actuating means, wherein - the valve assembly is arranged within the hydraulic pump and has - a first state for enabling a flow of the hydraulic fluid from the second sub-chamber to the first sub-chamber and - a second state for enabling a flow of the hydraulic fluid from the first sub-chamber to the second sub-chamber, - a first state for enabling a flow of the hydraulic fluid from the second sub-chamber to the first sub-chamber and - a second state for enabling a flow of the hydraulic fluid from the first sub-chamber to the second sub-chamber, - the hydraulic pump has a stator and a rotor, the pumping means being supported by the stator or the rotor and configured for pumping the hydraulic fluid from the low pressure pump chamber to the high pressure pump chamber due to a rotation of the rotor relative to the stator, - the stator is integral with and/or torque-proof connected to the hub and/or the pumping means is supported by the rotor, characterized in that - the stator comprises an internal gear being attached to the hub and the rotor comprising a rotor body being disposed within the internal gear and supported rotationally about the common rotational axis such that teeth of the internal gear and peripheral surface sections of the rotor body abut to form a radial bearing.