A transmission device according to the disclosure includes a plurality of driver sections and a controller. The plurality of driver sections are each configured to transmit a signal using a first voltage state, a second voltage state, and a third voltage state, and to be able to set a voltage in each of the voltage states. The third voltage state is a state between the first voltage state and the second voltage state. A controller causes the plurality of driver sections to perform emphasis by setting an emphasis voltage in each of the driver sections on the basis of skew information.