An endoscope, comprising: an insertion portion that is insertable into an observation object; a bending portion having a bendable tubular structure that is provided in the insertion portion; a distal end portion that is provided at a position that is further on a distal end side than the bending portion, and includes an observation portion for observing the observation object and a holding member for holding the observation portion, in which a proximal end side portion of the holding member is fitted into an inside surface of a tubular structure of a distal end side portion of the bending portion; a hole portion that is provided in the distal end side portion of the bending portion; a concave portion that is provided at a position corresponding to the hole portion in the proximal end side portion of the holding member; and a screw member which has a screw thread that is threaded on a circumferential surface into the hole to cause the screw member to penetrate the hole portion by screw-fastening, and whose distal end side is housed in the concave portion; and the screw member is held in a non-contacting state with respect to the concave portion in the hole portion, characterized in that a diameter (ΦD) in a plane perpendicular to a depth direction of the concave portion is larger than a maximum diameter (Φd) of the hole portion and larger than an outside diameter (Φd1) of the member, and a length obtained by adding a depth of the concave portion and a thickness of the distal end side portion of the bending portion, in which the hole portion is provided, is greater than an axial direction length of the member. an insertion portion that is insertable into an observation object; a bending portion having a bendable tubular structure that is provided in the insertion portion; a distal end portion that is provided at a position that is further on a distal end side than the bending portion, and includes an observation portion for observing the observation object and a holding member for holding the observation portion, in which a proximal end side portion of the holding member is fitted into an inside surface of a tubular structure of a distal end side portion of the bending portion; a hole portion that is provided in the distal end side portion of the bending portion; a concave portion that is provided at a position corresponding to the hole portion in the proximal end side portion of the holding member; and a screw member which has a screw thread that is threaded on a circumferential surface into the hole to cause the screw member to penetrate the hole portion by screw-fastening, and whose distal end side is housed in the concave portion; and the screw member is held in a non-contacting state with respect to the concave portion in the hole portion, characterized in that a diameter (ΦD) in a plane perpendicular to a depth direction of the concave portion is larger than a maximum diameter (Φd) of the hole portion and larger than an outside diameter (Φd1) of the member, and a length obtained by adding a depth of the concave portion and a thickness of the distal end side portion of the bending portion, in which the hole portion is provided, is greater than an axial direction length of the member.