[Object] An object of the present technology is to provide a handheld instrument for endoscope surgery having an ultrasonic imaging function with a practicable spatial resolution. [Solving Means] A handheld instrument for endoscope surgery according to the present technology includes: a shaft； a jaw； a handle； a phased array ultrasonic sensor； and a signal wiring. The jaw is placed at one end of the shaft and has a holding function. The handle is placed at the other end of the shaft and includes an operation mechanism for operating the jaw. The phased array ultrasonic sensor is mounted on the jaw and has an imaging function. The signal wiring is provided to the shaft and connects the ultrasonic sensor and the handle.
