Flow rate measurement device

Provided is a flow rate measurement device capable of reliably correcting a measurement error due to the temperature of a to-be-measured fluid. In the present invention, a vortex generator 32 is inserted to a flow path 31 in a measurement pipe 30 so as to generate a Karman vortex on the downstream side of the vortex generator 32, a temperature sensor 36 is disposed in a rear stage of a piezoelectric element 35 that detects a vortex change as an electric signal change, and a fluid flow rate is corrected on the basis of the relation between a vortex frequency at a fluid temperature measured with the temperature sensor 36 and a vortex frequency at a fluid reference temperature.