PROBLEM TO BE SOLVED: To provide an endoscope apparatus designed such that a light guide fiber is easily attached to a first support member.SOLUTION: An endoscope apparatus 1 comprises: a first support member 18 having a first body 22 with a first lens attached thereto, and a fixing member 24 with a fixing hole 23 formed therein, which extends in the direction of the axial line C1 of the first body and into which light guide fiber 45 can be inserted and a second support member 20 having a second body 31 with a second lens attached thereto, and also having an element support part 32 provided so as to project on the outside of the second body in a radial direction of the second body and supporting an imager on the basal end side of the second lens. The fixing hole has a small diameter hole 23a provided on the leading end side and engages the hard part 46 of the light guide fiber, and a large diameter hole 23b provided on the basal end side of the small diameter hole. The element support part overlaps the large diameter hole as viewed in the direction of the axial line. The distance Lbetween the leading end of the large-diameter hole in the direction of the axial line and an opposing surface 32a of the element support part is greater than the length Lof the hard part of the light guide fiber in the direction of the axial line.
