A pair of binoculars includes: a pair of lens barrels in each of which a telescopic optical system including an objective lens and an eyepiece is held; a reticle that is provided between the objective lens and the eyepiece of one of the telescopic optical systems movably in an optical axis direction of the one of the telescopic optical systems; and an adjusting ring that moves the reticle in the optical axis direction by rotation operation to adjust a position of the reticle in the optical axis direction.