To provide a pipe coupling capable of confirming a tightening completion when tightening hardware is tightened with a bolt and sufficiently performing the insertion of a pipe into a pipe inserting part of the pipe coupling.

This pipe coupling is provided with a pipe inserting part 13, externally inserted with tightening hardware 2 provided with lug parts 22, 23 for tightening bolt on a cutout part of a C-shaped ring into the pipe inserting part 13. C-shaped ring 21 is reduced in diameter and can be tightened from the above of the pipe by tightening a bolt 24 of the tightening hardware 2 which is externally inserted into the pipe externally inserted into the pipe inserting part 13. At a tip of the ear part 23 for tightening, a bent part 231 directing to the other lug part 22 for tightening is provided. At a tip of the bent part 231, a projecting part for locking 233 is provided.