A probe for an ultrasonic treatment apparatus is characterized in that a proximal end of the prove (30) is connected with an ultrasonic transducer (28) that generates ultrasonic vibrations, the prove (30) transmits ultrasonic vibrations generated by the ultrasonic transducer (28) from the proximal end to a distal end of the prove (30), the probe (30) comprises a treatment portion (32) that is formed at the distal end of the prove (30) and utilizes the transmitted ultrasonic vibrations to treat a living tissue, and the treatment portion (32) includes two or more protrusions (54a, 54b).
