The 18-month-old French Mastiff fell from a balcony in the Dutch town of Zevenaar.
It remained dangling from his leash and collar until neighbours and bystanders could cut the animal loose.
It was unconscious and had stopped breathing. One person then closed its mouth and breathed through its nose.
The dog began to show signs of life and a passing ambulance stopped to give the animal further assistance.
It was later taken to a veterinarian and has now fully recovered. Police say the owner, who wasn't home at the time, won’t be penalised.