The present invention relates to an adapter for connecting a sprinkler head.A through hole is formed between the sprinkler engagement portion 14 and the hose engagement portion 15 so as to assemble the valve in the lateral direction so that the valve body 4b and the valve body 4b, In the adapter for a sprinkler assembled with the sprinkler (4)The through hole 16a is formed with a tapered hole having a large diameter at the tip end and a small diameter at the rear end and a latching protrusion 16c is formed at the trailing end along with the latching step 16b so as to control the valve Respectively,The valve body 4b has tapered outer peripheral surfaces so as to coincide with the tapered through holes 16a, and O-rings 41 and 41 for sealing are installed on both sides of the water hole 4d, And a circular O-ring insertion hole (not shown) is formed on both sides of the water supply hole 4d so as to block the gap between the valve element 4a and the valve body 4b and to hold the O-ring 42 for blocking the water supply holes 12 and 12 And an elastic piece 44 having a latching protrusion 44 is formed on the upper and lower portions of the rear end of the valve body 4b to prevent the valve body 4b from being caught by the latching step 16b. So that the side surface of the resilient piece 44 can be caught by the engaging projection 16c to be controlled.The present invention has such a configuration that the engagement jaw 44 is caught by the engagement step 16b to support the rotation while being rotated. At this time, the O-ring 41 and the O-41 are inserted into the o-ring insertion grooves 43 on both side surfaces of the water supply hole 41. In addition, The O-ring 42 completely blocks the gap between the water supply hole 12 and the water supply hole 12 and the valve body 4b when the handle 4a is rotated to block the water, In addition, since the valve 4 is provided with the adapter 1 which is firmly assembled, it is possible to maximize the reliability, for example, b