PURPOSE: A vine guiding device for a greenhouse is provided to easily induce the growth of vines of crops by installing a bobbin including a vine guiding string. CONSTITUTION: A vine guiding device for a greenhouse comprises the following: a supporting shaft(1b) protruded from the center of a body in the right angle; fixing protrusions located on both sides of the supporting shaft, and a flexible groove on the tip-end of the supporting shaft; a protrusion piece(1c) formed on the upper front side of the body; a hook with a recessed groove formed on the lower center of the protrusion piece; a guiding piece(1d) with a string outlet located on the bottom of the body; a snap-ring groove(2b) for fitting a snap ring(2e); fixing grooves formed on both sides of an entrance of a central hole(2a) fitted to the supporting shaft on a supporter(1); a hanging protrusion(2c) formed on the outer tip-end of the supporter; a bobbin central tube(3a) fitted to a rotary shaft(2) and supported by the snap-ring; and a winding unit(3d) for winding a vine guiding string.본 발명은 비닐하우스 내부에 장치하여 비닐하우스 내부에서 육성하는 작물의 넝쿨을 의도하는 쪽으로 유인할 수 있게 만든 작물 넝쿨 유인구에 관한 것으로 넝쿨 유인끈을 감아 보유한 보빈을 지지대에 장치하여 유인끈의 길이를 조정할 수 있게 하고 지지대 위치를 비닐하우스 내부에 설치한 와이어로프에 걸어서 이동시킬 수 있게 구성함으로써 작물의 넝쿨을 편리하게 유도할 수 있도록 만든 것이다.