A transmission line according to an embodiment, includes a first conductor layer, a second conductor layer spaced apart from the first conductor layer, a first conductor line including a first region facing the first conductor layer and a second region facing the second conductor layer, the first conductor line being spaced apart from the first conductor layer and the second conductor layer, the first conductor line extending in a first direction, and a second conductor line spaced apart from the first conductor layer, the second conductor layer, and the first conductor line, the second conductor line extending in the first direction, the second conductor line being shorter than the first conductor line in the first direction in length.