An air-blowing device 10A includes an air blower 50 and a housing 20 that includes an intake hole 41a into which a fluid flows as a result of the air blower 50 being driven and an exhaust portion from which the fluid is discharged as a result of the air blower 50 being driven and that accommodates the air blower 50. The housing 20 is capable of expanding and contracting so as to change the internal volume of the housing 20.