This flow rate measurement device is provided with a flow rate signal detection unit which detects a flow rate signal of a fluid to be measured flowing through a flow path (1), a flow rate calculation unit (11) which calculates the flow rate from the flow rate signal detected by the flow rate signal detection unit, and an oscillation circuit (21) which generates a reference clock. Furthermore, this flow rate measurement device is provided with a temperature calculation unit (22) which calculates the temperature from the frequency change resulting from temperature change in the oscillation circuit (21), and a flow rate correction unit (23) which, by calculating an offset flow rate at a desired temperature, corrects, on the basis of the temperature calculated by the temperature calculation unit (22), the flow rate calculated by the flow rate calculation unit (11). By this means, the accuracy of the flow rate measurement can be improved.