This ventilation system (1) is equipped with: a case (2) that has at least a pair of vent holes (21); and a piezoelectric blower (3) that is attached at least to one of the pair of vent holes (21). The piezoelectric blower (3) generates a flow of air to be distributed through the vent holes (21) by vibrating a diaphragm by means of a piezoelectric component. According to this configuration, because the piezoelectric blower (3) has a thin plate-like shape, a forced convection of air can be produced with a small space. Additionally, because the piezoelectric blower (3) continuously operates as long as electricity is supplied, moisture can be quickly discharged from the inside of the case (2) to the outside.