An endoscope system comprises: an endoscope, further comprising a light-guiding member, and a drive unit which is capable of making the light-guiding member fluctuate such that a projection location of illumination light which is projected through the light-guiding member traces a trajectory corresponding to a prescribed scan pattern a coordinate information acquisition unit which acquires coordinate information, whereby it is possible to detect the projection location of the illumination light which is projected from the endoscope a determination unit which determines whether a projection range of the illumination light which is projected from the endoscope satisfies a prescribed angle of view a comparison unit and a control unit which, if the projection range of the illumination light does not satisfy the prescribed angle of view, adjusts drive signals which are supplied to the drive unit, and if the projection range of the illumination light does satisfy the prescribed angle of view, detects a degree of deviation between the trajectory of the projection location along the prescribed scan pattern, and the trajectory which is traced by the projection location which is detected on the basis of the coordinate information.Système dendoscope comprenant : un endoscope, comprenant en outre un élément guide de lumière, et une unité de commande qui est capable de faire fluctuer lélément guide de lumière de façon quune position de projection de la lumière déclairage qui est projetée à travers lélément guide de lumière trace une trajectoire correspondant à un diagramme de balayage prescrit une unité dacquisition de coordonnées qui acquiert des coordonnées, permettant de détecter la position de projection de la lumière déclairage qui est projetée à partir de lendoscope une unité de détermination qui détermine si une zone de projection de la lumière déclairage qui est projetée à partir de lendoscope satisfait ou non un angle de vue prescrit une unité de comparaison et une
