A vertically oriented roller oven have an oven housing forming an oven cavity, one or more food product inlet openings, an internal heating portion distinguishably separated by first and second series of centrally disposed vertically aligned and axially displaced rollers and an exit opening each in communication with the oven cavity. First and second backing plates are respectfully positioned opposite each of said first and second series of centrally disposed vertically aligned and axially displaced rollers to frictionally engage and capture a food product and causing the food product to descendingly traverse the internal portion of the oven cavity between the plurality of vertically aligned and axially displaced rollers and correspondingly positioned first and second backing plates. A conveying means is disclosed which includes a continuously linked chain motivated by an electric motor connected to a sprocket mountably affixed to a roller seating bracket and an engagement gear located on an end of at least one vertically aligned and axially displaced roller within said first or second roller series.