A metering device for utilisation with a syringe, which features on a syringe cylinder a fastening portion with at least one axially directed sensing surface projecting from the upside, and at least one alignment nose projecting from the outer perimeter of the fastening portion, and a plunger with a plunger rod comprising • an accommodation for the fastening portion of the syringe cylinder • having an axial opening for axially inserting the fastening portion into a fastening position, • a sensing device disposed in the accommodation with at least one sensing means projecting from a basis surface of the sensing device facing the axial opening, for sensing the at least one sensing surface of a fastening portion inserted in a fastening position, • at least one axial guiding means for adjusting the at least one alignment nose into an angular position with respect to rotation around the axis of the metering device, in which the syringe is axially directed towards at least one sensing means with at least one sensing surface, • an accommodation body with a plunger accommodation and a further axial opening for axially inserting the plunger rod into a fastening position, • fastening devices for detachably holding fastening portion and plunger rod in their fastening positions in the accommodations and in the plunger accommodation, and • plunger adjustment devices for shifting the accommodation body, characterised in that • the axial guiding means is present in the accommodation below the sensing device, wherein the guiding means has a guiding contour on the side that faces the axial opening, • said guiding contour has at least one indentation for receiving at least one alignment nose when the syringe is disposed with fastening portion and plunger rod being in their fastening positions, and • the at least one raised part neighbouring the indentation has a distance from the basis surface of the sensing device greater about Δh than the at least one indentation, wherein the syringe is adapted to be displaced with the at least one alignment nose from out the at least one indentation to the at least one raised part. • an accommodation for the fastening portion of the syringe cylinder • having an axial opening for axially inserting the fastening portion into a fastening position, • a sensing device disposed in the accommodation with at least one sensing means projecting from a basis surface of the sensing device facing the axial opening, for sensing the at least one sensing surface of a fastening portion inserted in a fastening position, • at least one axial guiding means for adjusting the at least one alignment nose into an angular position with respect to rotation around the axis of the metering device, in which the syringe is axially directed towards at least one sensing means with at least one sensing surface, • an accommodation body with a plunger accommodation and a further axial opening for axially inserting the plunger rod into a fastening position, • fastening devices for detachably holding fastening portion and plunger rod in their fastening positions in the accommodations and in the plunger accommodation, and • plunger adjustment devices for shifting the accommodation body, • the axial guiding means is present in the accommodation below the sensing device, wherein the guiding means has a guiding contour on the side that faces the axial opening, • said guiding contour has at least one indentation for receiving at least one alignment nose when the syringe is disposed with fastening portion and plunger rod being in their fastening positions, and • the at least one raised part neighbouring the indentation has a distance from the basis surface of the sensing device greater about Δh than the at least one indentation, wherein the syringe is adapted to be displaced with the at least one alignment nose from out the at least one indentation to the at least one raised part.