A terminal structure include an internal conductor connection portion, a removal portion and an external conductor connection portion. The internal conductor connection portion is connected to a internal conductor via a conducting portion and an external conductor. The removal portion is provided at a rear side relative to the internal conductor connection portion. The external conductor connection portion is provided at a rear side relative to the removal portion, is formed in the outer peripheral surface of the external conductor, is shut off from the internal conductor connection portion by the removal portion, and is connected to the external conductor.