A one-touch pipe connection device includes a socket main body portion including a plurality of pipe fitting portions in each of which a pipe is inserted; a sealing portion that provides sealing between the socket main body portion and the pipe; and a cap portion having a through hole through which the pipe is inserted into the pipe fitting portion and configured to be coupled to the pipe fitting portion by rotation while moving towards the pipe fitting portion such that the sealing portion is pressed and deformed to closely contact the pipe.