A mass flow rate measurement device which works according to the coriolis principle, and has two measurement tubes (1) and a vibration converter. It is provided that a carrier (2) is mounted on each of the measurement tubes (1) as a pair of carriers, and the vibration converter is made and arranged such that it acts between the pair carriers (2). In this way, a coriolis mass flow rate measurement device which is simple to produce is attained, with measurement tubes (1) which can be located extremely close to one another.