PROBLEM TO BE SOLVED: To prevent a supply liquid hose from contacting to cultivated plants. SOLUTION: This liquid-spraying apparatus has a throttle material 42 as a diameter reducing means to reduce the lateral diameter in a contracted state of a spiral ring unit 41 of a supply liquid hose 40 installed by winding in a spiral state. Thus, the liquid feed hose 40 does not contact to cultivated plants on the sides of a passage. As the lateral diameter of the spiral ring unit 41 of the liquid feed hose 40 is brought to be smaller, the width of the passage is brought to be smaller than that of the usual one and an effective area of cultivation is brought to be larger in a greenhouse.
