A scanning circuit, comprising first signal lines, second signal lines, third signal lines, a drive unit configured to drive the first signal lines, first buffers configured to drive the second signal lines in accordance with signals of the first signal lines, second buffers configured to drive the third signal lines in accordance with the signals of the first signal lines, and a shift register having a first part to be driven by signals of the second signal lines and a second part to be driven by signals of the third signal lines, wherein the first to third signal lines include two signal lines arranged in parallel to each other and configured to transmit the in-phase signals.