The unusual journey was captured on video after the taxi driver picked up the passengers in Alumwell Road in Pelsall.
Both passengers can be seen holding on to the ladder through the car windows, with one passenger sat in the front and the other directly behind.
WATCH the video here:
They hold the ladder steady as the car navigates speed bumps and traffic lights.
The video was uploaded to social media with the caption: "Only in Walsall no roof rack no problem".
The bemused driver decided to follow the taxi while one of his passengers caught the journey on camera.
Walsall Council has since responded to the footage, saying the safety of road users is of the "highest priority".
They added that community protection officers will be considering what action to take.
A spokesman for the authority said: "The safety of passengers and other road users is of the highest priority to Walsall Council.
"All licensed private hire drivers undergo a practical driving assessment and training course before their licence is granted.
"Community protection officers will be speaking to the proprietor and driver of this vehicle about the matter before considering what action to take.
"We would ask the person who took this video to contact the community protection team on 01922 653060 or email email@example.com and also members of the public who witness any behaviour of concern to contact us in the same manner."
Uber has been approached for comment.