A flow rate measurement apparatus includes: a plurality of flow paths 13 provided between an inflow port 11 and an outflow port 12; opening/closing sections 14 for opening/closing the plurality of flow paths 13; measurement sections 15 for measuring a flow rate of fluid flowing through at least one of the plurality of flow paths 13; and a control section 17 for controlling the opening/closing sections 14 and the measurement sections 15; The control section 17 includes a gain adjustment section 16 for correcting a gain of the measurement section 15 in a flow path which is closed by the opening/closing section 14.