Saphan Hok (Thai: สะพานหก, pronounced [sā.pʰāːn hòk]) is a bridge over the old city moat or Khlong Khu Mueang Doem in Bangkok's Phra Borom Maha Ratchawang and Wang Burapha Phirom sub-districts, Phra Nakhon district.

The bridge is located right in front of the entrance to Saranrom Park.

In the early Rattanakosin period, there were eight Saphan Hok in the area of Bangkok, in both the Phra Nakhon (Bangkok core side) and Thonburi sides.

The bridge-foot has been modified to a ladder and this structure continues to this day.

Saphan Hok was restored as a pedestrian bridge in 1982 on the 200th anniversary of the Rattanakosin era, and it was rebuilt using the photographic document of the period.