A power window switch circuit, comprising: a first relay coil having two terminals; a down switch connected to the first relay coil for lowering a window glass; a second relay coil having two terminals; and an up switch connected to the second relay coil for raising a window glass, wherein each of the down switch and the up switch has a first fixed contact (DN1; UP1) connected to a power supply, a second fixed contact (DN2; UP2) connected to the ground, and a movable contact (131; 132; 133; 134) selectively connecting one of the first and second fixed contacts to a first terminal of the corresponding relay coil; a first switching element (TR4; TR26) responsive to a soak detection signal, a soak detection circuit for supplying the soak detection signal to the first switching element when detecting a soak, a control circuit connected to the down switch and the up switch for outputting an excitation current supply signal when the movable contact (131; 132; 133; 134) of the down switch or the up switch is connected to the first fixed contact (DN1; UP1); and a second switching element connected between the power supply and the first terminals of the first and second relay coils (21; 23) for supplying an excitation current to the first terminals of the first and second relay coils (21; 23) in response to the excitation current supply signal from the control circuit, wherein said first switching element is connected between the second fixed contacts (DN2; UP2) of the down and up switches (128; 129) and the ground, and that the first switching element is also connected between the second terminals of the first and second relay coils (21; 23) and the ground, characterized by invalidating means connected to the first and second switching elements (TR1; TR4) for invalidating the operation of the second switching element in response to ON operation of the first switching element. a first relay coil having two terminals; a down switch connected to the first relay coil for lowering a window glass; a second relay coil having two terminals; and an up switch connected to the second relay coil for raising a window glass, wherein each of the down switch and the up switch has a first fixed contact (DN1; UP1) connected to a power supply, a second fixed contact (DN2; UP2) connected to the ground, and a movable contact (131; 132; 133; 134) selectively connecting one of the first and second fixed contacts to a first terminal of the corresponding relay coil; a first switching element (TR4; TR26) responsive to a soak detection signal, a soak detection circuit for supplying the soak detection signal to the first switching element when detecting a soak, a control circuit connected to the down switch and the up switch for outputting an excitation current supply signal when the movable contact (131; 132; 133; 134) of the down switch or the up switch is connected to the first fixed contact (DN1; UP1); and a second switching element connected between the power supply and the first terminals of the first and second relay coils (21; 23) for supplying an excitation current to the first terminals of the first and second relay coils (21; 23) in response to the excitation current supply signal from the control circuit, wherein said first switching element is connected between the second fixed contacts (DN2; UP2) of the down and up switches (128; 129) and the ground, and that the first switching element is also connected between the second terminals of the first and second relay coils (21; 23) and the ground, characterized by invalidating means connected to the first and second switching elements (TR1; TR4) for invalidating the operation of the second switching element in response to ON operation of the first switching element.