A chronometer and triathlon bicycle saddle construction having a bodywork supported by a frame to be coupled to a supporting tubular element of a bicycle, the bodywork having an enlarged bearing region operating for supporting the ischiatic tuberosities of a bicycle user, where the enlarged bearing region substantially corresponds to a middle central zone of the saddle bodywork, the saddle construction further having a water-bottle supporting element at the rear part of the saddle and integral with the saddle bodywork.