Vibronic-type measuring device (100; 200) for determining a mass flow or a density of a fluid medium, said device comprising: a measuring tube, which can oscillate (10; 110), and is curved in its rest position, wherein said tube is designed to conduct a medium, wherein the measuring tube (10; 110) has a measuring tube middle line extending in a measuring tube plane; a support body (30; 130); a first bearing body (21; 121) on the inlet side; a second bearing body (22; 122) on the outlet side; a first exciter unit (51; 151) on the inlet side; a second exciter unit (52; 152) on the outlet side; a first sensor unit (51; 151) on the inlet side; a second sensor unit (52; 152) on the outlet side; and an operating and evaluation circuit; wherein the first and the second bearing body (21; 121) are connected to the support body (30; 130), wherein the measuring tube (10; 110) is mounted on the first and second bearing body (22; 122) in such a way that flexural vibration modes of the measuring tube (10; 110) have vibration nodes on the bearing bodies, characterized in that the first and the second exciter unit (51, 52; 151; 152) are both designed to excite flexural vibrations of the measuring tube (10; 110) both in the measuring tube plane and perpendicularly to the measuring tube plane, depending on exciter signals the first and the second sensor unit (51, 52; 151; 152) are both designed to capture flexural vibrations of the measuring tube (10; 110) both in the measuring tube plane and perpendicularly to the measuring tube plane, and to output vibration-dependent sensor signals, and the operating and evaluation circuit is designed to output excitation signals to the exciter units for the selective excitation of flexural vibration modes and to receive the sensor signals of the sensor units. a measuring tube, which can oscillate (10; 110), and is curved in its rest position, wherein said tube is designed to conduct a medium, wherein the measuring tube (10; 110) has a measuring tube middle line extending in a measuring tube plane; a support body (30; 130); a first bearing body (21; 121) on the inlet side; a second bearing body (22; 122) on the outlet side; a first exciter unit (51; 151) on the inlet side; a second exciter unit (52; 152) on the outlet side; a first sensor unit (51; 151) on the inlet side; a second sensor unit (52; 152) on the outlet side; and an operating and evaluation circuit; wherein the first and the second bearing body (21; 121) are connected to the support body (30; 130), wherein the measuring tube (10; 110) is mounted on the first and second bearing body (22; 122) in such a way that flexural vibration modes of the measuring tube (10; 110) have vibration nodes on the bearing bodies, characterized in that the first and the second exciter unit (51, 52; 151; 152) are both designed to excite flexural vibrations of the measuring tube (10; 110) both in the measuring tube plane and perpendicularly to the measuring tube plane, depending on exciter signals the first and the second sensor unit (51, 52; 151; 152) are both designed to capture flexural vibrations of the measuring tube (10; 110) both in the measuring tube plane and perpendicularly to the measuring tube plane, and to output vibration-dependent sensor signals, and the operating and evaluation circuit is designed to output excitation signals to the exciter units for the selective excitation of flexural vibration modes and to receive the sensor signals of the sensor units.