Bipolar needle microwave surgical instrument

An object of the present invention, coagulation or the like of the biological tissue surface can be reliably and easily, and even when the inserted into body tissue such as coagulation deep, micro the vicinity of the tip portion of the microwave surgical device can be sufficiently solidified such to provide a wave surgical. The present invention, at least a pair of rod-shaped electrodes are arranged parallel to the central axis of the entire electrode, paired that between the electrodes is filled with an insulator bipolar needle microwave surgery, wherein use of the vessel. At least two pairs of electrodes are arranged alternately such that the electrode of the same polarity is not next to each other, of the paired electrodes, either the tip portions of the same polarity of the electrodes is bridged by the same material as the electrode configuration are preferably. Each electrode, it is preferable that the central axis 2mm in vertical distance.