A medical apparatus includes a rod, a heat-insulating coat having a heat insulating property, an electrically conductive coat having an electric conductive property. The heat-insulating coat is formed on at least a part of the rod in a circumferential direction of the rod. The heat-insulating coat is configured to suppress conduction of heat from a treatment target to the rod. The electrically conductive coat is formed on the heat-insulating coat and contacts the treatment target. The electrically conductive coat is configured to treat the treatment target using high-frequency energy.
