PROBLEM TO BE SOLVED: To provide a fiber probe capable of preventing a light volume from lowering at a center of a light emission area and effectively contributing to observation of a forward object.SOLUTION: A light transmitted through plural cores 4 of a multi core circle 2 in which the plural cores 4 are surrounded by a clad 5, is emitted from an emission part 3 on an end of the multi core circle 2 in the fiber probe 1. The emission part 3 is ground to be conical and its end is formed to be a curved surface 12 or flat surface.
