A transmission device comprising: a voltage control signal generating unit configured to generate a first voltage control signal from a transmission signal; an amplifier configured to amplify the transmission signal in response to the first voltage control signal; a first timing adjusting unit configured to adjust a control timing for the first voltage control signal; and a control timing setting unit configured to set the control timing adjusted by the first timing adjusting unit based on the output signal from the amplifier and the transmission signal, wherein the control timing setting unit includes: a second voltage control signal generating unit configured to generate a second voltage control signal from the transmission signal, an output signal transforming unit configured to generate a provisional voltage control signal from the output signal from the amplifier, a timing control unit configured to control a timing of the second voltage control signal, a signal generating unit configured to generate a signal which corresponds to the provisional voltage control signal generated by the output signal transforming unit based on the second voltage control signal and the second voltage control signal of which timing is controlled by the timing controlling unit, a comparing unit configured to compare the signal generated by the signal generating unit with the provisional voltage control signal, and a control timing determining unit configured to determine the timing of the second voltage control signal and determine the control timing to be set in the first timing adjusting unit. a voltage control signal generating unit configured to generate a first voltage control signal from a transmission signal; an amplifier configured to amplify the transmission signal in response to the first voltage control signal; a first timing adjusting unit configured to adjust a control timing for the first voltage control signal; and wherein the control timing setting unit includes: a second voltage control signal generating unit configured to generate a second voltage control signal from the transmission signal, an output signal transforming unit configured to generate a provisional voltage control signal from the output signal from the amplifier, a timing control unit configured to control a timing of the second voltage control signal, a signal generating unit configured to generate a signal which corresponds to the provisional voltage control signal generated by the output signal transforming unit based on the second voltage control signal and the second voltage control signal of which timing is controlled by the timing controlling unit, a comparing unit configured to compare the signal generated by the signal generating unit with the provisional voltage control signal, and a control timing determining unit configured to determine the timing of the second voltage control signal and determine the control timing to be set in the first timing adjusting unit. a second voltage control signal generating unit configured to generate a second voltage control signal from the transmission signal, an output signal transforming unit configured to generate a provisional voltage control signal from the output signal from the amplifier, a timing control unit configured to control a timing of the second voltage control signal, a signal generating unit configured to generate a signal which corresponds to the provisional voltage control signal generated by the output signal transforming unit based on the second voltage control signal and the second voltage control signal of which timing is controlled by the timing controlling unit, a comparing unit configured to compare the signal generated by the signal generating unit with the provisional voltage control signal, and a control timing determining unit configured to determine the timing of the second voltage control signal and determine the control timing to be set in the first timing adjusting unit.