Piezo actuator for carrying out an actuating movement, with a piezo bending transducer made of a carrier layer which is at least partially covered on one or two sides with a piezo lamella, with a movable end, and with a housing, - a reference stop connected to the housing for determining a reference position for the actuating movement, - a first bearing region which comprises regions of the piezo actuator and the housing and which allows for twists (Φ1) of the piezo bending transducer, - a second bearing region with a surface on the side of the bending transducer and a surface on the side of the housing, and an intermediate layer between the surface on the side of the bending transducer and the surface on the side of the housing, wherein the intermediate layer connects the surface on the side of the bending transducer and the surface on the side of the housing, wherein the intermediate layer can be liquefied, - and a pressure element for generating a bias torque on the piezo bending transducer around the first bearing region against the reference stop, characterized in that the piezo actuator is operable in an operating mode and an alignment mode, wherein the piezo bending transducer carries out actuating movements in the operating mode, the temperature of the intermediate layer is below its liquefaction temperature and the intermediate layer is sufficiently firm to transfer the bearing forces in the second bearing region, and wherein, in the alignment mode, the piezo bending transducer is aligned with a reference stop in that the temperature of the intermediate layer is above its liquefaction temperature due to a supply of heat and wherein the intermediate layer is liquefied in the alignment mode by an external heat source or with an integrated heating element which is in thermal contact with the second bearing region. with a piezo bending transducer made of a carrier layer which is at least partially covered on one or two sides with a piezo lamella, with a movable end, and with a housing, - a reference stop connected to the housing for determining a reference position for the actuating movement, - a first bearing region which comprises regions of the piezo actuator and the housing and which allows for twists (Φ1) of the piezo bending transducer, - a second bearing region with a surface on the side of the bending transducer and a surface on the side of the housing, and an intermediate layer between the surface on the side of the bending transducer and the surface on the side of the housing, wherein the intermediate layer connects the surface on the side of the bending transducer and the surface on the side of the housing, wherein the intermediate layer can be liquefied, - and a pressure element for generating a bias torque on the piezo bending transducer around the first bearing region against the reference stop, - a reference stop connected to the housing for determining a reference position for the actuating movement, - a first bearing region which comprises regions of the piezo actuator and the housing and which allows for twists (Φ1) of the piezo bending transducer, - a second bearing region with a surface on the side of the bending transducer and a surface on the side of the housing, and an intermediate layer between the surface on the side of the bending transducer and the surface on the side of the housing, wherein the intermediate layer connects the surface on the side of the bending transducer and the surface on the side of the housing, wherein the intermediate layer can be liquefied, - and a pressure element for generating a bias torque on the piezo bending transducer around the first bearing region against the reference stop, characterized in that the piezo actuator is operable in an operating mode and an alignment mode, wherein the piezo bending transducer carries out actuating movements in the operating mode, the temperature of the intermediate layer is below its liquefaction temperature and the intermediate layer is sufficiently firm to transfer the bearing forces in the second bearing region, and wherein, in the alignment mode, the piezo bending transducer is aligned with a reference stop in that the temperature of the intermediate layer is above its liquefaction temperature due to a supply of heat and wherein the intermediate layer is liquefied in the alignment mode by an external heat source or with an integrated heating element which is in thermal contact with the second bearing region.