The subject innovation is increasingly in communication with the inlet (15) relates the number of agricultural becoming seriously lack in irrigation control apparatus for the efficient use of a form of water pipe insertion portion 7 is provided extending downward in an eccentric position on the upper surface of the main body 1, and a quantity controlled to be secured to the inner jaw (21) formed on the top edge portion of the main body 1 by fixing means such as an adhesive or a bolt fixing plate (3) and the quantity adjusting the fixed plate (3) along the upper end periphery of the quantity adjusting spindle (2) which is in close contact rests presented, the quantity adjusting the fixed plate 3 and the rotary plate are through-bonded to the central axis portion of the rotating plate (2) supporting the spring bolt (6) and said body (1) and so on is composed of a cover 4 that is coupled to the fixing means such as a nut formed in the gap portion 14 and the cover fixing bolt (10), the adjustment quantity the fixed plate 3 and the spindle 2 is provided with semi-circular (半圓形) and the water inlet (16,16 ') are formed, the And is characterized in that quantity control knob (8) on the upper surface side of the quantity adjusting spindle (2) are integrally formed, the device must be attached to the inner side channels, so the cover 4 is to minimize the resistance to the water flow is characterized to be made of the inclined surface (Wired) and working area is sealed with the outside as the rotating plate is made so as not to interfere with operation due to foreign matter entering the operation is smooth and does not leak.