Coriolis measuring transmitter of a Coriolis measuring device for measuring a mass flow or a density of a medium flowing through a pipe comprising: at least one pair of measuring tubes arranged to oscillate against each other, wherein each measuring tube comprises a centrally arranged bend, wherein in an equilibrium position the measuring tubes of a pair of measuring tubes are symmetrical with respect to a symmetry plane between both measuring tubes; at least one driver to oscillate the measuring tubes and at least two sensors for measuring the oscillations of the measuring tubes; two guiding devices arranged for guiding the medium from the pipe to the measuring tubes and vice versa, wherein each guiding device comprises a fluid chamber with a first opening for connection (21.1) with the pipe and with a second opening (21.2) for each measuring tube for connection with the measuring tubes, wherein the guiding devices are each formed from multiple parts, especially formed from two parts, wherein a first part (20.01) forms a pipe connecting part and wherein at least one second (20.02) part forms a measuring tube connecting part, wherein in a projection of the fluid chamber onto said symmetry plane, the fluid chamber follows a chamber bend (21.3) connecting a measuring tube volume (11.1) with a pipe volume, wherein the first part (20.01) and the at least one second part (20.02) are connected leak tightly by an interface respectively, wherein the connection of the interface is secured by one of the following methods: screwing, locking, clicking, gluing, welding, bonding, sintering, brazing; characterized in that, said interface comprises a protrusion (22.1) and a recess (22.2) at least partially complementary to said fluid chamber following said chamber bend in said projection. at least one pair of measuring tubes arranged to oscillate against each other, wherein each measuring tube comprises a centrally arranged bend, wherein in an equilibrium position the measuring tubes of a pair of measuring tubes are symmetrical with respect to a symmetry plane between both measuring tubes; at least one driver to oscillate the measuring tubes and at least two sensors for measuring the oscillations of the measuring tubes; two guiding devices arranged for guiding the medium from the pipe to the measuring tubes and vice versa, wherein each guiding device comprises a fluid chamber with a first opening for connection (21.1) with the pipe and with a second opening (21.2) for each measuring tube for connection with the measuring tubes, wherein the guiding devices are each formed from multiple parts, especially formed from two parts, wherein a first part (20.01) forms a pipe connecting part and wherein at least one second (20.02) part forms a measuring tube connecting part, wherein in a projection of the fluid chamber onto said symmetry plane, the fluid chamber follows a chamber bend (21.3) connecting a measuring tube volume (11.1) with a pipe volume, wherein the first part (20.01) and the at least one second part (20.02) are connected leak tightly by an interface respectively, wherein the connection of the interface is secured by one of the following methods: screwing, locking, clicking, gluing, welding, bonding, sintering, brazing; characterized in that, said interface comprises a protrusion (22.1) and a recess (22.2) at least partially complementary to said fluid chamber following said chamber bend in said projection.