Endoscope

An endoscope comprising:

• a plurality of illuminating optical systems;
• an objective optical system, and
• an optical-path splitting member, wherein
• the optical-path splitting member has an optical element which forms a first optical path and a second optical path,
• an optical-path length of the first optical path differs from an optical-path length of the second optical path,
• illumination light is irradiated to an object from the plurality of illuminating optical systems,
• the objective optical system has an object-side incidence surface which is located nearest to the object,
• each of the plurality of illuminating optical systems has an object-side emergence surface which is located nearest to the object,
• each of the object-side emergence surfaces is located on an image side of the object-side incidence surface, and
• following conditional expression (1) is satisfied:
• 2.0<Dmin/OPLdiff<50 (1)
• where,
• Dmin denotes a minimum of depth amounts, and the depth amount is a distance in an optical axial direction from the object-side incidence surface up to the object-side emergence surface, and
• OPLdiff denotes a difference in the optical-path length of the first optical path and the optical-path length of the second optical path.