A horse-bus or horse-drawn omnibus was a large, enclosed, and sprung horse-drawn vehicle used for passenger transport before the introduction of motor vehicles. It was mainly used in the late 19th century in both the United States and Europe, and was one of the most common means of transportation in cities. In a typical arrangement, two wooden benches along the sides of the passenger cabin held several sitting passengers facing each other. The driver sat on a separate, front-facing bench, typically in an elevated position outside the passengers' enclosed cabin. In the main age of horse buses, many of them were double-decker buses. On the upper deck, which was uncovered, the longitudinal benches were arranged back to back.

A horse-drawn vehicle is a piece of equipment pulled by one or more horses. These vehicles typically have two or four wheels and were used to carry passengers or a load. They were once common worldwide, but they have mostly been replaced by automobiles and other forms of self-propelled transport but are still in use today.