A bicycle cable seal fitting seals a portion of an inner wire that is connected to a cable-operated device casing. The bicycle cable seal fitting includes a mounting member and an elastic seal member. The mounting member has a fastening portion to be fastened to the casing, and an inner wire guiding passage with a funnel shaped section that widens as it extends towards the fastening portion. The seal member includes an attaching portion, and a seal portion forming a sealing passage that communicates with the inner wire guiding passage. The seal portion includes a first section with a first width and a second section with a second width that is smaller than the first width of the first section to contact an outside surface of the inner wire passing therethrough. The first section is disposed between the funnel shaped section and the second section.