A compressed-fluid discharge control device configured to control discharge of compressed fluid, comprising: a valve chamber provided with a seat and configured to communicate with a supply channel (24, 66) through which the compressed fluid is supplied and a discharge channel including a discharge port through which the compressed fluid is discharged; a diaphragm valve including a pilot path (78, 80) and configured to block communication between the supply channel (24, 66) and the discharge channel by being seated on the seat and to establish the communication by being separated from the seat; a pilot-chamber opening and closing valve configured to open and close a pilot chamber into which the compressed fluid is introduced from the supply channel (24, 66) via the pilot path (78, 80), wherein the pilot-chamber opening and closing valve includes a solenoid valve configured to be opened when energized and to be closed when de-energized, and when the pilot-chamber opening and closing valve is opened to open the pilot chamber, the diaphragm valve is separated from the seat, and thereby the supply channel (24, 66) and the discharge channel communicate with each other; characterized in that a storage chamber configured to store the compressed fluid is disposed between the supply channel and the valve chamber; and wherein when the diaphragm valve is in a closed state, the compressed fluid supplied from the supply channel is stored in the storage chamber; immediately after the diaphragm valve is opened, the compressed fluid stored in the storage chamber is discharged at a maximum discharge pressure via the discharge channel; and subsequently the diaphragm valve is kept open and the compressed fluid that has flowed through the storage chamber is discharged at a discharge pressure lower than the maximum discharge pressure via the discharge channel. a valve chamber provided with a seat and configured to communicate with a supply channel (24, 66) through which the compressed fluid is supplied and a discharge channel including a discharge port through which the compressed fluid is discharged; a diaphragm valve including a pilot path (78, 80) and configured to block communication between the supply channel (24, 66) and the discharge channel by being seated on the seat and to establish the communication by being separated from the seat; a pilot-chamber opening and closing valve configured to open and close a pilot chamber into which the compressed fluid is introduced from the supply channel (24, 66) via the pilot path (78, 80), wherein the pilot-chamber opening and closing valve includes a solenoid valve configured to be opened when energized and to be closed when de-energized, and when the pilot-chamber opening and closing valve is opened to open the pilot chamber, the diaphragm valve is separated from the seat, and thereby the supply channel (24, 66) and the discharge channel communicate with each other; characterized in that a storage chamber configured to store the compressed fluid is disposed between the supply channel and the valve chamber; and wherein when the diaphragm valve is in a closed state, the compressed fluid supplied from the supply channel is stored in the storage chamber; immediately after the diaphragm valve is opened, the compressed fluid stored in the storage chamber is discharged at a maximum discharge pressure via the discharge channel; and subsequently the diaphragm valve is kept open and the compressed fluid that has flowed through the storage chamber is discharged at a discharge pressure lower than the maximum discharge pressure via the discharge channel.