As for the endoscope system of this invention, the probability calculation section which calculates probability value concerning that position being the specified object 1st information and the 1st information which are obtained from the position sensing station and that picture which detect the position where the specified object is shown in the picture of the subject which is obtained by the image pickup section and the image pickup section which subject image pickup are done making use of with the 2nd information which differs, as the extent which shows accuracy and, it possesses.本発明の内視鏡システムは、被写体を撮像する撮像部と、撮像部により得られた被写体の画像において所定の対象を示す位置を検出する位置検出部と、その画像から得られる第1の情報と、第1の情報とは異なる第2の情報とを用い、その位置が所定の対象であることについての正確さを示す度合いとしての確率値を算出する確率算出部と、を有する。
