There is provided an ultrasonic treatment apparatus capable of preventing the slipping of a treatment target to certainly perform the treatment. An ultrasonic treatment apparatus 12 includes: an ultrasonic transducer 17 which generates ultrasonic vibrations, an elongated vibration transmitting member 28 whose proximal end portion is connected with the ultrasonic transducer 17 and which transmits the ultrasonic vibrations from the proximal end portion to an distal end portion, and a treatment portion 36 which is provided at the distal end portion of the vibration transmitting member 28 and applies the ultrasonic vibrations to a treatment target. The treatment portion 36 includes a distal end surface portion 46, and the distal end surface portion 46 includes a holding portion 52 configured to hold the treatment target.
