An endoscope comprising: an insertion portion including a distal end portion and a bending portion; an operation portion that is provided on a proximal end side of the insertion portion and includes a first sheath body and a second sheath body, the first sheath body and the second sheath body being attachable to and detachable from each other by moving the second sheath body with respect to the first sheath body in a longitudinal direction of the insertion portion; a plurality of bending wires (14U, 14D, 14L, 14R), which are internal components of the endoscope, extended from the bending portion, inserted through the insertion portion and guided into an internal space of the operation portion; a fluid tube (15a, 15w1, 15w2, 15s, 19a, 19w1, 19w2, 19s), a light guide fiber bundle (16a, 16b), and a signal cable, which are internal components of the endoscope, extended from the distal end portion, inserted through the insertion portion and guided into the internal space of the operation portion; a partitioning board member; characterized in that the partitioning board member partitions the internal space of the operation portion into a first space in which the plurality of bending wires are inserted and disposed, and a second space in which the fluid tube (15a, 15w1, 15w2, 15s, 19a, 19w1, 19w2, 19s), the light guide fiber bundle (16a, 16b), and the signal cable are inserted and disposed; and by an endoscope internal component position regulating member that has predetermined resilience, is attachable to and detachable from a predetermined position of the partitioning board member, and regulates, in a state of being attached to the partitioning board member, insertion states of the fluid tube (15a, 15w1, 15w2, 15s, 19a, 19w1, 19w2, 19s), the light guide fiber bundle (16a, 16b), and the signal cable which are extended from the insertion portion toward the second space into a predetermined state. an insertion portion including a distal end portion and a bending portion; an operation portion that is provided on a proximal end side of the insertion portion and includes a first sheath body and a second sheath body, the first sheath body and the second sheath body being attachable to and detachable from each other by moving the second sheath body with respect to the first sheath body in a longitudinal direction of the insertion portion; a plurality of bending wires (14U, 14D, 14L, 14R), which are internal components of the endoscope, extended from the bending portion, inserted through the insertion portion and guided into an internal space of the operation portion; a fluid tube (15a, 15w1, 15w2, 15s, 19a, 19w1, 19w2, 19s), a light guide fiber bundle (16a, 16b), and a signal cable, which are internal components of the endoscope, extended from the distal end portion, inserted through the insertion portion and guided into the internal space of the operation portion; a partitioning board member; characterized in that the partitioning board member partitions the internal space of the operation portion into a first space in which the plurality of bending wires are inserted and disposed, and a second space in which the fluid tube (15a, 15w1, 15w2, 15s, 19a, 19w1, 19w2, 19s), the light guide fiber bundle (16a, 16b), and the signal cable are inserted and disposed; and by an endoscope internal component position regulating member that has predetermined resilience, is attachable to and detachable from a predetermined position of the partitioning board member, and regulates, in a state of being attached to the partitioning board member, insertion states of the fluid tube (15a, 15w1, 15w2, 15s, 19a, 19w1, 19w2, 19s), the light guide fiber bundle (16a, 16b), and the signal cable which are extended from the insertion portion toward the second space into a predetermined state.