The laser light source 4 and a plurality of optical fibers are bundled so that the tumor can be punctured and the laser beam can be efficiently irradiated from the inside of the tumor, and the laser beam can be irradiated uniformly over a wide range. The puncture irradiation unit 6 is configured by a substantially cylindrical optical member, and the tip end portion 6A is formed in a substantially conical shape, one end surface 8A is connected to the laser light source 4, and the other end surface 8B is connected to the puncture irradiation unit 6. Provided is a local treatment device 2 including the optical transmission member 8 and the vibration applying unit 10 that applies vibration to the optical transmission member 8.腫瘍への穿刺及び腫瘍内部からのレーザ光照射を効率的に実施でき、かつレーザ光をより広範囲にムラなく照射することが可能なように、レーザ光源４と、複数の光ファイバが束ねられた略円筒状の光学部材から構成され、先端部６Ａが略円錐状に形成された穿刺照射部６と、一方の端面８Ａがレーザ光源４に接続され、他方の端面８Ｂが穿刺照射部６に接続された光伝送部材８と、光伝送部材８に振動を与える振動付与部１０と、を備えた局所治療装置２を提供する。
