This flow rate measurement device (1) comprises: an inlet part (6) into which gas flows; a plurality of channels through which gas flows, the channels being disposed between the inlet part (6) and the outlet part (7) from which the gas flows out; flow rate measurement units (M1 to Mn) disposed in each of the plurality of channels and used for measuring the flow rate of a fluid that flows through the channels; and a control unit (3) for stopping operation for measuring the flow rate for a portion of the flow rate measurement units on the basis of the measurement results obtained by the flow measurement units (M1 to Mn), and determining whether to restart the operation for measuring the flow rate by a portion of the flow rate measurement units on the basis of the measurement results obtained by a monitoring measurement unit, which is another flow rate measurement unit for which flow rate measurement operation is not stopped.