A shift register circuit having a level conversion function is provided with a simple circuit configuration. Each basic circuit of the shift register circuit includes: a first transistor of a second conductivity type having a first electrode to which a second supply voltage is applied; a second transistor of the second conductivity type having a first electrode connected to a second electrode of the first transistor and a second electrode connected to an output node; a third transistor of a first conductivity type having a first electrode to which a first supply voltage is applied and a second electrode connected to the output node directly or through another transistor, the first conductivity type being different from the second conductivity type; and a fourth transistor of the first conductivity type having a first electrode to which the first supply voltage is applied and a second electrode connected to the second electrode of the third transistor, wherein a clock signal is supplied to a control electrode of the first transistor, a set signal is supplied to a control electrode of the second transistor, a clear signal is supplied to a control electrode of the third transistor, a reset signal is supplied to a control electrode of the fourth transistor, and a voltage of the output node is an output of a scanning circuit.