The present invention relates to a tapping tee, wherein a joint part formed to be round with respect to the front surface so as to be fixed in contact with a pipe, a perforation extending vertically from the center of the joint part, and a branch protruding horizontally from the side of the perforation part a body portion having a portion; and a cutter for perforating the pipe through elevating and lowering motions inside the perforation portion, wherein a sealing tab on the upper portion of the main body prevents gas leakage from the pipe due to elevating and lowering motions of the cutter It is characterized in that it is installed. Accordingly, by installing a sealing tab at the uppermost end of the body portion, arranging a plurality of inner O-rings on the inner circumferential surface of the sealing tab, and arranging one or more outer O-rings on the outer circumferential surface of the sealing tab, movement of the shaft or cutter that moves up and down through the sealing tab It is possible to effectively prevent the gas inside from leaking during or separation.
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