The present invention provides a power window apparatus that, even if a CPU (IC2) causes malfunction or becomes uncontrollable upon submergence, can prevent windows from performing unexpected operations and enables the windows to be opened without fail if desired. The power window apparatus comprises: a driving part that has two current input-output ends, and opens or closes automobile open/close parts, depending on the direction of a flowing current; two relays which respectively have exciting coils and switching contacts, wherein, when a current is fed to the exciting coils, the switching contacts connect the current input-output end to a positive or negative pole of power; a submergence detecting sensor that drops in resistance value between both ends thereof when exposed to water; and a submergence-time escape switch that forcibly drives the open/close parts open upon submergence, wherein transistors are provided which are connected in series with the exciting coils and feed a current to the exciting coils, and the bases of the transistors are grounded via the submergence detecting sensor.