To suppress appearance of a streak depending upon a position of a transistor group.

An electrooptical device comprises: a first substrate; k×n data lines formed on the first substrate; n demultiplexers for supplying an image signal to the k×n data lines; k control signal lines for supplying a control signal to the n demultiplexers; and n image signal lines for supplying the image signal to the n demultiplexers. Each of the n demultiplexers includes: k transistors connected between one of the n image signal lines and k data lines out of the k×n data lines for supplying the image signal to one data line selected in accordance with the control signal; and k waveform shaping circuits for shaping a waveform of the control signal input to the k transistors.