PURPOSE: To provide a pouring outlet for carton which is simple to open and capable of resealing.

CONSTITUTION: A sealing member 25 is formed integral with a lower and inner wall of a cylindrical part 23 of a pouring part body 2 through a thin-walled part 24, and an arched protrusion 27 with a hole 26 in a top surface 26 is provided in an upper surface of the sealing member 25. On the other hand, an anchor-shaped hook 32 to insert into and engage with the hole 26 in the arched protrusion 27 is provided on a rearside of a ceiling of a cap 3. Rotation of the cap 3 in a direction to put off the cap 3 makes the anchor-shaped hook 32 pull the arched protrusion 27 and separate the sealing member 25 at the thin-walled part 24. Thus an unsealing can be achieved. After unsealing, the cap 3 can be put on to seal again just as a prior art cap can be done.