A metering device with a syringe, wherein the syringe has the following features: a syringe cylinder and a syringe plunger, wherein the syringe cylinder has an outlet at the bottom, a centering collar at the top on the outer perimeter, a cylindrical plunger travel region that is connected to the outlet and in which the syringe plunger is sealingly guided, and the syringe plunger has a coupling piece at the top end, or with a syringe family having a plurality of such syringes, and wherein the metering device has the following features: - a housing comprising - a receptacle for the centering collar of the syringe cylinder with an axial opening for axial insertion of the centering collar into a mounting position, - a retaining body with a plunger seat for axial insertion of a coupling into a mounting position, - mounting devices (47, 50) for detachable holding of the centering collar and the coupling piece in their mounting positions in the seat and in the plunger seat, - wherein the mounting devices (47, 50) have gripper devices that can be radially advanced for gripping the centering collar and the coupling in the mounting positions, and - plunger control devices for shifting the retaining body in the housing, characterized in that - the syringe cylinder has a cylindrical centering region of the syringe cylinder which is further to the top than the plunger travel region, and - the metering device has a centering element that is arranged in the seat, is oriented toward the axial opening, and has an axial passage which, when the syringe is inserted into the metering device, axially penetrates the cylindrical centering region of the syringe cylinder and radially abuts the inside of the centering region. a syringe cylinder and a syringe plunger, wherein the syringe cylinder has an outlet at the bottom, a centering collar at the top on the outer perimeter, a cylindrical plunger travel region that is connected to the outlet and in which the syringe plunger is sealingly guided, and the syringe plunger has a coupling piece at the top end, or with a syringe family having a plurality of such syringes, and wherein the metering device has the following features: - a housing comprising - a receptacle for the centering collar of the syringe cylinder with an axial opening for axial insertion of the centering collar into a mounting position, - a retaining body with a plunger seat for axial insertion of a coupling into a mounting position, - mounting devices (47, 50) for detachable holding of the centering collar and the coupling piece in their mounting positions in the seat and in the plunger seat, - wherein the mounting devices (47, 50) have gripper devices that can be radially advanced for gripping the centering collar and the coupling in the mounting positions, and - plunger control devices for shifting the retaining body in the housing, characterized in that - the syringe cylinder has a cylindrical centering region of the syringe cylinder which is further to the top than the plunger travel region, and - the metering device has a centering element that is arranged in the seat, is oriented toward the axial opening, and has an axial passage which, when the syringe is inserted into the metering device, axially penetrates the cylindrical centering region of the syringe cylinder and radially abuts the inside of the centering region. - a housing comprising - a receptacle for the centering collar of the syringe cylinder with an axial opening for axial insertion of the centering collar into a mounting position, - a retaining body with a plunger seat for axial insertion of a coupling into a mounting position, - mounting devices (47, 50) for detachable holding of the centering collar and the coupling piece in their mounting positions in the seat and in the plunger seat, - wherein the mounting devices (47, 50) have gripper devices that can be radially advanced for gripping the centering collar and the coupling in the mounting positions, and - plunger control devices for shifting the retaining body in the housing, - the syringe cylinder has a cylindrical centering region of the syringe cylinder which is further to the top than the plunger travel region, and - the metering device has a centering element that is arranged in the seat, is oriented toward the axial opening, and has an axial passage which, when the syringe is inserted into the metering device, axially penetrates the cylindrical centering region of the syringe cylinder and radially abuts the inside of the centering region.