The invention relates to a device for measuring the flow rate of a fluid, said device comprising a body (20) and at least one ultrasound transducer (23) having a first end that is called the proximal end (25), which end is flush fitted into said body, and extending, while projecting from said body, in a longitudinal direction as far as a second end, which is called the distal end (26), of the transducer. The distal end (26) fits into a rabbet (31) of the body (20), the rabbet rigidly fastening the distal end with respect to the body (20) in at least one direction orthogonal to said longitudinal direction.
