An energy treatment instrument includes: an insertion section, a base, a needle section, an output section, and a cover portion. The needle section includes a tip end projecting in a first direction relative to the base. The output section is configured to output energy to an outside of the needle section when supplied with energy. The cover portion includes an end portion which is movable relative to the base. The cover portion is configured to move between a first position and a second position. In the first position, the cover portion is configured to protect the tip end of the needle section and the output section. In the second position, the end portion of the cover portion is evacuated from the tip end of the needle section and the output section.
