A fluid discharging apparatus comprising: a storage chamber configured to store a fluid; a discharge port that communicates with the storage chamber and is configured to discharge the fluid; a supply unit configured to supply the fluid to the storage chamber by pressure; a moving object configured to move in a first direction toward the discharge port and in a second direction away from the discharge port in the storage chamber; a pressure changing mechanism configured to change pressure of the fluid supplied to the storage chamber or pressure of the fluid in the storage chamber; and a control unit configured to control driving of the moving object, wherein the control unit is configured to perform discharging processing and moving processing, in which in the discharging processing, the discharge port is opened by moving the moving object from a closed position at which the discharge port is closed, in the second direction, and then the fluid is extruded and discharged from the discharge port by moving the moving object in the first direction, in the moving processing, the moving object is moved in the second direction during a period when the fluid is discharged from the discharge port in the discharging processing, characterized in that the control unit is configured to control driving of the pressure changing mechanism and to perform pressure control processing, in the pressure control processing, the pressure changing mechanism is driven to suppress an increase in pressure of the storage chamber, which occurs during the moving processing, the fluid discharging apparatus further comprises a buffer room which communicates with the storage chamber and is configured to accommodate the fluid, the pressure changing mechanism is configured to change the pressure of the storage chamber by changing a space volume of the buffer room, and the control unit is configured to cause the space volume of the buffer room to be increased in the process of the moving processing being performed, so as to suppress an increase in pressure of the storage chamber. a storage chamber configured to store a fluid; a discharge port that communicates with the storage chamber and is configured to discharge the fluid; a supply unit configured to supply the fluid to the storage chamber by pressure; a moving object configured to move in a first direction toward the discharge port and in a second direction away from the discharge port in the storage chamber; a pressure changing mechanism configured to change pressure of the fluid supplied to the storage chamber or pressure of the fluid in the storage chamber; and a control unit configured to control driving of the moving object, wherein the control unit is configured to perform discharging processing and moving processing, in which in the discharging processing, the discharge port is opened by moving the moving object from a closed position at which the discharge port is closed, in the second direction, and then the fluid is extruded and discharged from the discharge port by moving the moving object in the first direction, in the moving processing, the moving object is moved in the second direction during a period when the fluid is discharged from the discharge port in the discharging processing, characterized in that the control unit is configured to control driving of the pressure changing mechanism and to perform pressure control processing, in the pressure control processing, the pressure changing mechanism is driven to suppress an increase in pressure of the storage chamber, which occurs during the moving processing, the fluid discharging apparatus further comprises a buffer room which communicates with the storage chamber and is configured to accommodate the fluid, the pressure changing mechanism is configured to change the pressure of the storage chamber by changing a space volume of the buffer room, and the control unit is configured to cause the space volume of the buffer room to be increased in the process of the moving processing being performed, so as to suppress an increase in pressure of the storage chamber.