Abstract: A pipe joint structure for an upright valve includes a pipe joint, a resilient ring, a connection cylinder and an inner sleeve. The pipe joint includes a first chamber to receive a positioning ring and a seal ring. The resilient ring, the connection cylinder and the inner sleeve are inserted in the pipe joint in sequence. When a connection pipe is inserted in the pipe joint, the connection pipe will be inserted in a one-way direction and fastened by fastening talons of the resilient ring. To disengage the connection pipe, top push flanges of resilient claws of the inner sleeve are pushed to an inner limit inclined surface of the positioning ring to disengage the connection pipe from the fastening talons, such that the connection pipe can be pulled out. The present invention provides a quick connection and can prevent the connection pipe from being pulled out unexpectedly.