An ultrasonic treatment apparatus includes a probe main body performing a vibration including a longitudinal vibration in a vibrating direction parallel to a longitudinal axis, and a distal treatment section positioned on a distal direction side with respect to a most distal node position positioned most distally among node positions of the longitudinal vibration in the probe main body. A probe side facing surface is provided in a position facing a jaw in a surface of the distal treatment section. A coating portion is made of a material having a higher heat resistance than the probe main body, and coats a surface facing a side opposite to the probe side facing surface in the probe main body.
