A hose fitting which comprises a body having a longitudinal fluid passage adapted to receive a hose, an O-ring provided in the fluid passage so as to give water- or air-tightness to a space formed between the outside surface of the hose inserted in the fluid passage and the surrounding wall thereof, a quick hose-disconnecting mechanism provided between the O-ring and the outlet of a fluid passage for gripping the hose in such a manner as to prevent reverse motion and disconnecting the hose by the aid of a single manual pressing operation, and a rotary joint provided rotatably at the inlet end of the fluid passage and adapted to be connected to a fluid supply source.