PURPOSE: To obtain excellent picture quality by providing a switch comprising a transistor(TR) further to a switch input and turning on the input TR when the switch is turned off so as to fix a video signal to an L level.
CONSTITUTION: A switch comprising a TR 8(9) is provided respectively to an input of switches 5, 6. Thus, a video signal not selected by using a switching signal (c) and its inverting switching signal (d) is fixed to an L level at the input of the switch. Thus, a signal being a cause to crosstalk is not inputted to a switch of the post-stage. Thus, crosstalk between the switches 5, 6 is avoided to prevent deterioration in the picture quality.