Binoculars comprising: a first lens barrel having a telescopic optical system; a second lens barrel having a telescopic optical system, said second lens barrel forming a pair with said first lens barrel; and an interconnecting portion including an axial member (22, 23) having an axis, a first interconnecting member which is provided integrally with said first lens barrel, and a second interconnecting member which is provided integrally with said second lens barrel; said axial member (22, 23) interconnecting said first interconnecting member and said second interconnecting member so as to be relatively rotatable about said axis; said axis being a common axis about which said first and second lens barrels (2R, 2L) rotate and which is parallel to an optical axis of each of said telescopic optical systems; said axial member (22, 23) being made up of a first axial member and a second axial member which are inserted into each other in the direction of said axis; said first interconnecting member and said second interconnecting member being connected to said first axial member so that said first and second lens barrels (2R, 2L) are relatively rotatable about said axis; an interpupillary distance being adjusted by relatively rotating said first and second lens barrels about said axial member (22, 23), (a) a click position setting mechanism serving to set a click position at a predetermined angle of rotation of said first and second lens barrels, said click position setting mechanism being configured to include: a rotating member being provided on said axial member (22, 23) so as to be rotatable about the axis of said axial member (22, 23) and facing said interconnecting portion in a direction of the axis of said axial member (22, 23); a protruded portion being provided on any one of said interconnecting portion and said rotating member; and a plurality of recessed portions being provided on the other of said interconnecting portion and said rotating member and being capable of engaging with said protruded portion, wherein said click position is set corresponding to a rotating position of said rotating member; and (b) a lock/unlock member locking the rotation of said rotating member with respect to said axial member (22, 23) and unlocking the locked rotation thereof; wherein said rotating member is supported on a part of outer peripheral surface of said second axial member freely rotatable about the axis, and disposed apart from said first interconnecting member in a state of facing said first interconnecting member with a slight gap in the direction of the axis, and said rotating member engages with said part of outer peripheral surface of said second axial member so as to be incapable of moving in the direction of the axis, thereby regulating a movement of said rotating member toward said first interconnecting member along the axial direction of said axial member (22, 23); and said plurality of recessed portions correspond to a plurality of click positions. (a) a click position setting mechanism serving to set a click position at a predetermined angle of rotation of said first and second lens barrels, said click position setting mechanism being configured to include: a rotating member being provided on said axial member (22, 23) so as to be rotatable about the axis of said axial member (22, 23) and facing said interconnecting portion in a direction of the axis of said axial member (22, 23); a protruded portion being provided on any one of said interconnecting portion and said rotating member; and a plurality of recessed portions being provided on the other of said interconnecting portion and said rotating member and being capable of engaging with said protruded portion, wherein said click position is set corresponding to a rotating position of said rotating member; and (b) a lock/unlock member locking the rotation of said rotating member with respect to said axial member (22, 23) and unlocking the locked rotation thereof; wherein said rotating member is supported on a part of outer peripheral surface of said second axial member freely rotatable about the axis, and disposed apart from said first interconnecting member in a state of facing said first interconnecting member with a slight gap in the direction of the axis, and said rotating member engages with said part of outer peripheral surface of said second axial member so as to be incapable of moving in the direction of the axis, thereby regulating a movement of said rotating member toward said first interconnecting member along the axial direction of said axial member (22, 23); and said plurality of recessed portions correspond to a plurality of click positions.